Regarding travel forwards or backwards in time, outside of normal temporal constraints, and the implications and repercussions thereof.

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What's the nature of Eternity?

In the first part of "End of Eternity" it seems like Eternity is off in a separate plane of reality, disconnected from time. But then later it explains how each section was duplicated for each ...
8
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0answers
159 views

Story About Time Travel Using a Gate on the Sun

When I was in high school (6 or 7 years ago), one of the short stories that we read out of the text book had to do with an alien civilization that had discovered time travel. They had managed to ...
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1answer
41 views

What determines whether or not a timeline is “Doomed”?

In recent Homestuck updates, Terezi posed the possibility that she, Roxy, and John were all stuck within a doomed timeline; one that would eventually peter out into nothingness and from which no true ...
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3answers
139 views

Looking for a book featuring a soldier/marine travelling to a different time/universe

I picked up a book a year ago and read the summary at the back(part of a series maybe?) at a airport bookshop but had to stop because of my flight was about to depart. I can't remember the author or ...
7
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2answers
481 views

Why was there apparently no knowledge of the missing ship in the Typhon Expanse?

In the TNG episode "Cause and Effect", we are treated to the following line of dialogue...three times. "Captain's Log, Stardate 45652.1. The Enterprise has entered an area of space known as the ...
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2answers
220 views

In ST Voyager, why do they keep & use technology from the future?

Mainly the doctor's mobile emitter - they obviously have some rules about not disturbing the timeline via the temporal time directive by leaving advanced technology in the past, so why would they on ...
7
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2answers
156 views

Short story involving time travel

I read a short story about 25 years ago in an anthology (it might have been Hugo nominated stories or some such). The story is about a failed author who is visited by a man from the future who ...
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2answers
138 views

Can Time Travel (back to the future style) ever be possible without creating a paradox? [closed]

On each occasion that Marty and the Doc (and Biff) travel back in time they end up creating a brand new timeline. Marty makes some effort to repair it in BTTF1 but there are still notable differences. ...
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3answers
565 views

If the Federation has effective time travel, why don't they use it to correct major problems in the past?

In Star Trek IV: The Voyage Home, we see Kirk and his crew can perform fairly accurate time travel via the light-speed breakaway factor. Is there any reason they don't use this technique more ...
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1answer
132 views

Short story where a moved book in a library changes time

Caution, this one is a little complicated... My girlfriend is searching for a book her father read long time ago. Here are the snippets I'm aware of: The story was in a book containing multiple ...
10
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0answers
142 views

Seeking story about time travel used to steal from the future

I'm looking for a short story that I read in an anthology. In it, I think the theory was that you could time travel, but could never take anything that would be missed. As in, if you went to the ...
11
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1answer
1k views

Asimov short story about nuke going off in 1945

This story is about someone from the future ensuring the first atomic bomb is set off in 1945 so that the "future" would be one in which Earth would be the only source of intelligence in the galaxy. ...
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1answer
114 views

Book about an industrialist that finds an animal in space that creates portals

I am looking for a sci-fi book I read in the late 80's or early 90's dealing with a a rich space industrialist that finds an animal in space that, when stimulated, creates propulsion. Later in the ...
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1answer
234 views

Harry Potter Time Turner question: how is murdering past or future selves possible? Is it possible to prevent someone from dying [duplicate]

In Harry Potter, it seems like Time Turners are mostly used to correct minor things or do things that wouldn't have any major effect. Also, in Prisoner of Azkaban, it seems like Time-Turners/time ...
9
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2answers
2k views

What's that movie where the character travels back in time by his mind?

I watched a movie back when I was a kid, I would say during the 80's maybe early 90's. This movie was about a character who succeeded in time traveling by just thinking of it. At the end of the movie, ...
5
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1answer
130 views

How did Kate & Leopold solve their money problems without L. marrying for money as he had been expected to?

In the 2001 move Kate & Leopold, before the time travel from 1876, Leopold is being forced to marry some rich American as the family fortune is depleted. In the end he announces that he plans to ...
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1answer
128 views

How did the displaced persons know how to carry on once Sam Beckett jumped out of their bodies? [duplicate]

In Quantum Leap, Sam Beckett switched into other peoples bodies and changed, or restored, or ensured history that was guided to the history as it was known in Sam's own timeline. These people seemed ...
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1answer
268 views

How is Doc still alive if he was shot back in 1885?

In Back to the Future: Part III, we see the grave of Doc. If Doc. Emmet L. Brown is dead and has a grave, then how come he is still alive and kicking in 1885? If he is alive because Marty went back ...
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0answers
78 views

Book about time travel to the Eruption of Vesuvius era

I read this amazing book about time travel, where people seems to randomly travel back in time where: Main protagonists appear in or near Pompeii with memory loss. The book ends with the Eruption of ...
5
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2answers
139 views

Looking for a book - Time Travel and Alternate Time Lines

I know this is a long shot but I'm looking for the name of a book I read when I was younger (early 70's). From what I recall, the main story was a bunch of soldiers got picked up by a time traveling ...
11
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1answer
251 views

What's the title of this temporal loop short film?

I remember seeing, years ago, a short film about a guy who gets stuck in a time loop and is forced to relive the same few minutes of his life over and over. In one iteration, he talks to his ...
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4answers
2k views

What paradox is this scenario?

I've been thinking about various time-travel related paradoxes, and have wondered what the name of the paradox is where something doesn't have a cause. Take the following example: Let's say there is ...
3
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1answer
179 views

What coherent fictional time travel theories exist? [closed]

(TLDR - first two paragraphs.) I have been nurturing a pet theory for a few years now on time travel theories in fiction. My pet theory is, there are only two basic theories for how backward or ...
3
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2answers
212 views

Superman time-travels to red Sun age

I have a rather vague recollection of this comic book. I believe I read this in early 70's. Superman time-travels back to the time when the Sun is a red star. The Earth is (rather strangely) inhabited ...
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1answer
188 views

Identify a story about a group of time-travelers

I remember reading the article in Wikipedia years back, but I never bookmarked it, and now I'd like to read the story/novel. It was about a group of people who live in another place/dimension, and who ...
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0answers
112 views

Stories involving Time Travel and Disease Immunity? [closed]

When Europeans came in large numbers to the New World, the sicknesses they carried caused pandemics for Native Americans and wiped out much of the population. I would imagine that if a time traveller ...
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3answers
5k views

Why is the “Arnold Schwarzenegger” terminator referred to by two different product numbers (T-101, T-800)?

In the original film, The Terminator, Schwarzenegger's character was a "Cyberdyne Systems Model 101". Likewise for Terminator 2 & 3. However, in the video game adaptation of Terminator 3, this ...
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1answer
388 views

Why does the number “99” appear (backwards, spelled in airborn fire) in Back To The Future part 2?

It seems to be a commonly accepted theory that the car skidded before going back to 1855. However, the car didn't really seem to skid, so much as explode. It certainly didn't appear to move in such a ...
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1answer
217 views

Time travel to WWII

I'm looking for a book that is at least 20 years old A group of people travel back in time to WWII. They try to change the course of the war and ultimately succeed, however in the end it is revealed ...
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1answer
1k views

What was the role of Shadow Proclamation in The Time War?

I have watched only the post 2005 episodes. The Shadow Proclamation is the highest authority in the entire universe. I mean they are the Police guys and law-keepers. I had a doubt if any other ...
3
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0answers
106 views

Time Travel Series 60-70s 3-4 books - Time machine appears on the lawn at a university

trying to find a old series, cannot find anything by goggling front covers for time-travel novel. Main character gets in a timemachine and goes forward, watching the rise and fall of at least 2 more ...
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3answers
252 views

How does Claire travel through the standing stones in Outlander?

In Outlander the book by Diana Gabaldon, I recall (although it has been several years) Claire falling into the stones and accidentally back in time. In the new television adaptation, however, the ...
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1answer
112 views

Help ID a trapped in time comic

I'm trying to find an old comic I once read. Details:The story involves a group of scientists that are tossed back in time to the 1800's. They have no way of getting back. I think they tried to make ...
4
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1answer
206 views

How many alternate Star Trek timelines have been presented to us onscreen in the Franchise?

If parallel universes are included as alternate timelines, how many alternate Star Trek timelines have been presented to us onscreen in the Franchise? For the sake of clarification, Tomorrow is ...
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2answers
151 views

Looking for a book I read from mid to late 90's about humans as aliens

There were humans on Earth but these two specific humans were from another planet. They were lovers from a long time ago, possibly thousands of years ago. They would lose each other periodically and ...
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2answers
271 views

How does time travel work in Babylon 5?

I've recently watched Season 3's War Without End, Parts 1 and 2 (spoilers about that episode in this question) and while I enjoyed it, I became confused about how time travel is supposed to work in ...
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1answer
176 views

How does the Doctor keep track of his age? [duplicate]

Throughout the Dr. Who series, the doctors have claimed to be hundreds, even thousands of years old, (the tenth and eleventh both claim to be around 900, but throughout the series, eleven jumps into ...
5
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1answer
287 views

Old old science fiction story

I'm looking to find an old science fiction story that I read in an anthology many years ago (probably in the 60s) called 'What Time Is It?' It's about a group of high-school or college age boys that ...
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7answers
9k views

Why didn't Hermione use the Time-Turner to sleep more?

Hermione has the Time-Turner in Prisoner of Azkaban and uses it all year to take extra classes. Many times in the book she's exhausted and barely managing all of her studies. What I never understood ...
7
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1answer
181 views

Book where a woman with martial arts skills goes back to king Arthur's time

I'm looking for the title of a book which I read in 2001 in Australia. I had to leave it there when I returned to Germany. The story details are as follows: A young, relatively small woman is ...
3
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3answers
687 views

Why didn't Snape think of the Time-Turner?

During Prisoner of Azkaban, Harry and Hermione use the Time-Turner to save Buckbean and Sirius. Snape suspects Harry was involved in Sirius’s disappearance. To calm Snape, Dumbledore points out that ...
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1answer
215 views

Can you identify this time travel book series?

read a book series in 2009, can not remember the title of the book nor who wrote it. i remember it started with two males driving at night through the country, they pull over and walk into a paddock, ...
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2answers
2k views

Why didn't they use the invisibility cloak while on time travel?

In The Prisoner of Azkaban movie Harry and Hermione used Time-Turner to save Sirius. After advising them to use Time-Turner Dumbledore remind them "you must not be seen". If it was a vital law to use ...
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3answers
299 views

Book about a time-traveling dinosaur hunter

I read a book back in the late 70's and here's what I remember: There were a group of people who 'bought a tour' to time travel back to the dinosaur era. They travel on a disc shaped platform. There ...
3
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1answer
178 views

Fiction novel involving time traveling dinosaurs that then destroy humanity

I am trying to recall the title a fiction novel that involves a race of sentient dinosaurs that travel from the past into the future to when humanity is living underground, possibly due to apocalyptic ...
5
votes
1answer
180 views

Trying to find title of book about feline man who ride large cats

Looking for a series of books about an old man who starts out on a yacht but something happens and he wakes up in the body of a young feline-like man. He also has a telepathic link to a large cat ...
4
votes
1answer
416 views

Identify time travel story. Modern soldier goes back to days of mounted Knights with scientists

Read this sometime in the 80's(actually read it after 1999). A mission from an intricate lab (in the present(?)) back to Medieval times went awry when a soldier took back live munitions, specifically ...
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0answers
180 views

What happens if a person dies while using H.G Wells' time machine?

In the Warehouse 13 universe, Helena G.Wells' "Time Machine" works by creating a mental link to a person in the past. What would happen if the person whose body the user hijacks (for 22 hours and ...
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1answer
146 views

What is the appropiate way to use money in the past? [closed]

Assuming time travelling is possible and there are no fancy regulations, what would be the best way to take this time's money with me to buy things in some time/place in the past? I'm asking this ...
2
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1answer
98 views

Brother-sister pair time travel to resolve 1962 Cuban Missile Crisis

Story ID requested: There's a post-nuclear Earth c. 2060 in which the 1962 Cuban Missile Crisis escalated all the way. A brother and sister are sent back to keep that from happening. They succeed, ...