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

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How was the messaging system in The Arrows of Time (Orthogonal #3, by Greg Egan) supposed to work?

In particular, why didn't messages being relayed from the future use up bandwidth and prevent new messages from being sent back?
20
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2answers
2k views

How much time passed between The Lion, the Witch, and the Wardrobe and Prince Caspian?

The book series will nonchalantly say "hundreds" or "a thousand" or "thousands" of years in different places throughout, but is it ever stated exactly how much time passed between Peter, Susan, ...
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2answers
97 views

Did the USS Olympia go forward in time?

DS9 "The Sound of her Voice": LISA [OC]: My name's Lisa Cusak. Until a couple of days ago, I was the commanding officer of the Olympia. SISKO: The Olympia. LISA [OC]: We left the ...
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1answer
37 views

What happened to the time portal in DS9 “Time's Orphan”?

DS9 "Time's Orphan": DAX: It's some sort of time portal. From the chroniton signature, we think it sent Molly about three hundred years into the past. So the Federation now has it's hands on a ...
-1
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1answer
57 views

Why did they use a transporter instead of somebody simply walking through the field grabbing Molly and walking back to the current time?

DS9 "Time's Orphan": DAX: It's some sort of time portal. From the chroniton signature, we think it sent Molly about three hundred years into the past. KIRA: I wonder what this place was ...
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0answers
24 views

Why do the O'Briens or anybody else remember the events that occured once Molly is returned to the original timeline?

DS9 "Time's Orphan": [Portal chamber] (All the tech stuff is gone except for lights.) O'BRIEN: Everything's ready to go. I've recalibrated the temporal field generator. We should be ...
8
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2answers
111 views

Identification: Looking for author/ title of time travel books

Looking for author/ title of time travel books (trilogy?). It is a dying planet story, and time travel is regulated/ policed (under government control). Books and historical records are kept off ...
7
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3answers
322 views

Time Turner Problem - See Yourself

There is a question I wanted to ask some Time ago and I'm not quite sure it hasn't been answered already. In fact if so, i did not find something. At the moment I do not have the books with me, but I ...
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0answers
61 views

In Repeaters why did nobody notice (spoiler)?

In the Movie Repeaters (2010) why does nobody notice I don't believe Michael returns after a day of killing and raping to the rehab to his room, lays down in his bed and sleeps there. I either ...
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1answer
178 views

Why did the timeline revert back to its original state after Janeway destroyed the temporal core in the episode “Year of hell”?

Voyager "Year of Hell part 2": TUVOK [OC]: Captain, we won't be protected. JANEWAY: Exactly. If that ship is destroyed all of history might be restored. And this is one year I'd like to ...
2
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0answers
116 views

Science fiction show that was shown in middle school in the 90's

I remember being in 6th grade in Home Economics (or something) and the teacher had us watching this science fiction show similar to Doctor Who where this team of people who where (orange?) jumpsuits ...
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2answers
173 views

Was Doc Brown about to break his own rules?

Richard's comment on this question made me realize that Doc Brown seems to be a bit hypocritical. Allow me to explain. The whole reason Marty ends up in 1955 (as opposed to any other point in ...
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7answers
1k views

Can somebody please explain the end of the movie “Project Almanac” to me?

I just watched the movie "Project Almanac." I kind of understood everything, I guess as much as a person can understand a time travel movie...until the end. David destroys the Circuit, clear box, or ...
6
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1answer
77 views

Need a book title: stars sent through black hole/wormhole

I remember reading a sci-fi book awhile back, probably early 2000's, but can't for the life of me find the book again or remember the title. Humans are already in space and they come upon a beacon of ...
1
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1answer
98 views

How did Miles O'Brien time travel?

In DS9 "Visionary" O'Brien time travels 5 hours into the future because of a quantum singularity in a cloaked Warbird orbiting DS9. I just watched the episode and am really confused. Here's the ...
8
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1answer
130 views

Can you identify this time-travel/alternate history novel?

I read this sometime in the 2000s, in another state, so I can't go back and check the shelves. A scientist discovers time-travel, or something like it -- it's a time-sea. Swimming in it causes ...
3
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1answer
247 views

What did Janeway do with the 29th century tricorder she took?

In the Star Trek Voyager episode: "Future's End": JANEWAY: Welcome to the twenty fourth century. I took the precaution of removing your tricorder. That's what it's called, by the way. ...
4
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1answer
147 views

Soldier teleports himself out of a tank using his mind; discovers he's from the future

I am looking for a book that I read many years ago as a teen. I think it was in the 1970's but the book could have been written earlier. It starts with a soldier in Korea in a tank that is hit by a ...
5
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1answer
606 views

Was Skynet limited in how far into the past it could send back Terminators?

I have always wondered why Skynet only sends back one Terminator at a time, and why it keeps trying to assassinate targets who know they are being targeted. After the first Terminator was sent to ...
12
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3answers
4k views

How did Picard actually cause the destruction of human kind?

Through the final episode of Star Trek: The Next Generation, we learn that This part is really unclear for me. How could the anomaly stop the combination of amino acids into the first proteins? Is ...
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1answer
182 views

Why did Picard describe the past as “the past” when he was actually there?

During final episode of Star Trek: The Next Generation Picard is moving back and forth in time and we can see three timelines: current, past and future. Two times during his "visit" to the past ...
2
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2answers
236 views

Which Time Travel theory does The Flash follow?

In the latest episode of The Flash However, this does raise the question: Which Time Travel theory applies in The Flash? ...would imply a single universe model, as changes in the past ...
5
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1answer
179 views

Short story where life is lived out of chronological order

I think I read this short story (within the past five years) which was a science fiction (possibly post-apocalyptic) short story anthology. There was some kind of event which caused the world to ...
5
votes
1answer
134 views

Man with saucer shaped machine that may or may not been a time travel machine

What is name of (TV?) Movie (possibly british) from between 1970-1980's involving a man with saucer shaped machine that may or may not been a time travel machine? I am trying to remember a film I saw ...
3
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0answers
72 views

Identify story about time-travelling assassin that can kill by touching people

Please help me identify a short story about a time-travelling assassin. His time machine is a car. He gets assignments over the car radio from "The Oracle." His 2 henchmen are named Chubb and ...
3
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1answer
134 views

Sci-fi movie where time-travelers(?) journey to ancient Rome/Greece(?)

I'm trying to remember a movie. The only thing I remember clearly is that there were modern explorers in a land or time that resembles ancient Rome or Greece. At the end of the movie during a ...
2
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0answers
78 views

Book about time travellers finding world with robot vs human gladiators and 100 ft jesus robot

Searching for SF book read in youth (80s) Time travellers go to cryo-sleep in mountain crypt, perhaps to avoid fallout from nuclear war? Wake up to find Earth much changed. Ruled by theocracies? ...
4
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1answer
169 views

Two spacecraft pilots travel at light speed, meet back on Earth in different era due to time dilation

I've been looking for the name of a sci-fi romance book about space travel but haven't been successful so far. I came across it a few years ago, read the plot on its back cover but didn't read the ...
3
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1answer
122 views

Scifi book with FTL travel that caused the ship to split into multiple copies

I'm trying to remember the name/series of this book that I read (at least) a few years ago. It had a sci-fi space travel theme, but was mostly set on this planet that had "zones" that kept people ...
3
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0answers
153 views

Time Machine Short Story in Letter/Essay format

I'm trying to remember the name of a short story that's written in the form of a letter to a doctor/professor (I think). The writer of the letter/essay, who is a scientist, describes an experience ...
2
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1answer
196 views

Is there any consistency regarding time travel in Star Trek?

Every so often, there's an episode of Star Trek involving time travel, and more often than not, the "rules" seem to change from episode to episode. For example, Future's End, Braxton explains that ...
3
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0answers
67 views

Looking for a children's book about a video game that allowed time travel back to the time of the dinosaurs

I'm hoping someone could help me find a book from my childhood. The protagonist is a young boy who gets given a video game that accidentally allows him to travel back to a time when dinosaurs are ...
10
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1answer
190 views

Pre-Historic Time Travel Short Story

I read a short story around 1989 in which a man somewhere in Europe (London/Paris maybe) sent a pocket watch somewhere (in time) and it came back a few minutes later rusted. The man decided to send ...
5
votes
1answer
119 views

Late 70's TV movie - woman sacrifices herself for child (neanderthal?) with blanket

I'm looking for the name of a late 70's/early 80's SFF tv movie or episode where a woman scientist sacrifices herself for a child (who may be neanderthal?) and they travel back in time or get beamed ...
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0answers
94 views

What happened to Thumper in The Butterfly Effect?

In the movie The Butterfly Effect, what happened to Thumper? Did he change or disappear? Or did it form a different timeline which caused him to change into something else ?
5
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1answer
144 views

SciFi / fantasy book from 80s about Jesus, present-day New York, time travel and the Dead Sea scrolls

I read this book back in the late 80s/ early 90s. I remember the title of the book as Mission. It started with a man being admitted to a hospital in present-day NY at Easter, with all of the wounds ...
5
votes
2answers
108 views

Young adult novel involving time travel, Asian military base

I'm looking for a child / YA book that featured time travel. It would have been published around or before 1975. I remember that it had some minor travel to the past, then travel to the future, to a ...
13
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2answers
1k views

When do phone calls to the TARDIS come through?

Throughout series 8 of Doctor Who, we see phone calls from Danny to Clara while she's travelling with the Doctor in the TARDIS. Now it's clear that when the TARDIS has stopped at somewhere reasonably ...
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1answer
129 views

Is this the Time Travel Bootstrap Paradox? - US Banknote [closed]

Is the following example using a US Banknote a Bootstrap Paradox? In January 2015, the US Govt prints a USD 10 banknote with serial no. #123456. In February 2015, it is issued for circulation and ...
2
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1answer
386 views

In Steins;Gate (The Show), how does the first D-mail change the universe

Spoilers All: In episode 1, Okabe sends the 1st D-mail, changing the world to the Alpha world line where Kurisu lives instead of dying. In episode 22, They reverse this by having Daru hack into SERN ...
2
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1answer
131 views

Two friends meet famous historical men

Okay I have been looking for this book for years now. It could be from 1999 to 2004. It is the story of two boys who are friends. They travel back in time as famous male friends such as President ...
4
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3answers
222 views

Were time-turners available during the first wizarding war?

It has been established that time-turners are wizard-made. We also know that time-turners were not available during the second wizarding war because they were all destroyed during the events of Order ...
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0answers
97 views

Why did the Reese stop aging after travelling back to 1987?

In 12 Monkeys the TV series, the 3rd episode from the end just aired, and it depicts Reese going back in time and then living 40 years without getting older. Likewise the mysterious woman is an adult ...
4
votes
1answer
170 views

Teenage girl finds clothes that make her travel back in time

I read this book as a girl some time ago. It was about a young girl (early teens?) who is rummaging through some old clothes, (at her mums friends house/ or mebe a shop) . She finds this article of ...
9
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1answer
415 views

Technology breaking down, No-one knows how to fix it

the story, or maybe part of a larger work, I am thinking of involves a portrait of either a.) an alien race or more likely b.) the future human race this race relies entirely on their technology ...
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vote
1answer
740 views

How did The Flash break the time “barrier” if light can't? [closed]

The Flash S01 E15 was one of the best episodes I've ever watched on TV, and it left me hanging like a piñata. It ended much like Continuum which was good too. But it left me wondering, if the flash ...
6
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1answer
121 views

Short animation of a spaceship running against time

It's basically a man riding a spaceship at full speed thru a canyon in a random rocky planet.. Then he gets out and RUNS holding a pod into a big building, jumping over bodies stuck in time, only to ...
2
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3answers
374 views

Time loop paradox in The Flash

In season 1, episode 15 (Out of Time), we see a time loop in the end. Assuming the timeline when the episode started to be x, in the end, we get to timeline x+1. So, does Barry retain his ...
6
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0answers
100 views

Looking for time-changing story

In the story I'm looking for, the main character is a convicted murderer who is an experimental subject in a scientific research project into the nature of time. He has been subjected to some sort of ...
4
votes
1answer
169 views

Young adult fantasy series from 80s about a girl transported to a different reality?

Looking for a series I read when I was in middle school 20-25 years ago. All I remember is a girl visiting an older man on her way home from school is accidentally transported to a different reality. ...