This is Beverly Crusher, but played by Gates McFadden's body double, Patricia Tallman.
Here she is on the set of the film Star Trek: Generations, again doubling for McFadden:
This is another instance where you can see Tallman's face in the finished product. In the corresponding scene from the film, Data is conversing with Crusher played by McFadden, but ...
Most of them are easy for a serious Trekkie like yourself:
(picture with arrows found online)
But let's do this properly.
The one you probably didn't know
The guy in the top right was the hardest to identify: his name is Patrick Baker, owner of Farrell's Ice-cream Parlor and a celebrity handler for Wizard World Chicago, who was working at the Con that ...
In actuality, there's probably only about a dozen or so actors used for Stormtroopers (lots of actors are reused, like Jeremy Bulloch appearing in ESB as both Boba Fett and an unmasked Imperial Officer)
Most of the vast legions of Stormtroopers are created utilizing matte paintings.
A matte painting is a painted representation of a ...
Henriksen is typically considered the correct answer, though whether or not he qualifies is more ambiguous than Paxton1:
In the original Terminator film, Henriksen plays one of the detectives working the "Phone Book Killer" case. He's shot repeatedly during the T-800's attack on the police station, and we'...
The top-left corner guy likely works for the Rosemont Theatre.
Here's that photo again, taken right from rand al'thor's answer (which he took from a preexisting web article), and for completeness I'll say that the top-right guy is celebrity handler Patrick J. Baker — also see rand al'thor's answer for the details.
The real mystery is the guy in the ...
This appears to be Kill Order, a 2017 movie starring Chris Mark.
In the trailer, you can see a number of the points you describe, including waking up from a nightmare and a SWAT team coming for him while he's in class:
I think that is Anne Francis, but she does not look right in that picture because the image was seemingly created from a black-and-white still that was ineptly colored. Notice that the colors on the uniforms are totally wrong. Compare the buff in the lobby card to the correct blue-gray (where I selected an image manifestly taken from a viewing of the film)....
The Star Trek guy
As user Nathan K. Campbell already pointed out, the alien from The Search for Spock, who McCoy tries to secure passage to Genesis through, is played by Allan Miller:
Allan Miller Bio at Memory Alpha
Allan Miller Filmography at IMDb
Miller's filmography does not include Star Wars Episode IV: A New Hope. Usually, IMDb filmographies ...
This is Cameron Oppenheimer playing Tactical Officer Ensign Kellogg. The actress actually 'stood in' for Gates McFadden on several occasions (as did Patricia Tallman due to their similar physique) which I'm assuming is why you're mistaking the two of them.
As far as I can tell, her only line (despite appearing in over a dozen episodes) was "Counselor?" in ...
Whilst colourized for 1950's movie posters, the image is of Anne Francis on set, in costume and in a scene about an hour and 18 minutes into the movie. The angle is slightly different than the movie camera so is likely taken by and on-set photographer. As I can't match the exact poses of the actors, it is most likely from a different take or from a rehearsal ...
The actor in STIII is Alan Miller:
He does not appear to have a connection to Star Wars
The alien in the cantina is Kardue'sai'Malloc per Wookieepedia and was a played with an actor in a Rick Baker mask:
Here is a better picture in which you can see it is certainly a mask and bears little resemblance to ...
From checking the movie-dude site, it seems clear that this is Annette Kerr, playing the role of "Scientist", as shown below. "Childen of the Damned" doesn't appear in her CV at IMDB, however, and she is not listed in the cast.
The voices, in addition to Burnham, are those of Pike, Spock, and Sarek:
Jeffrey Hunter as Capt. Pike from "The Cage"
One of the voices is Capt. Pike, played by Jeffrey Hunter, extracted directly from the TOS original pilot "The Cage":
PIKE: You bet I'm tired. You bet. I'm tired of being responsible for two hundred and three lives. I'm tired of deciding ...
As per phantom42's answer, this was the days just before CGI, so there were a few live actors composited onto small live-action windows in matte paintings by these painters:
Star Wars: Ralph McQuarrie and Mike Pangrazio
Empire Strikes Back: Harrison Ellenshaw, Ralph McQuarrie, Mike Pangrazio
Return of the Jedi: Mike Pangrazio, Chris Evans, Frank Ordaz
Penny McCarthy signs autographs of Labria, as
Original research below:
We already know that the Star Trek alien was played by Alan Miller, the real question is just who played Labria in Star Wars.
This is an interesting issue because no one really seems to know for absolute sure. Amongst the community of Star Wars BTS-...
I can't answer the actual question, since the individual parts aren't credited and I haven't found any specifically attributed recordings of the individual actors to try to identify the actor by voice.
However the entire episode is available on archive.org including the credits. The credited actors are: Lyle Sudrow, Stan Early, Bob Hastings, Mercer McLeod,...
I should preface this by saying that the following may contain spoilers, in that knowing the location of shooting, and knowing that certain actors were present in that location, you may be spoiled as to who appears where. Just sayin'.
That is a photo from a recent football match from the Sevilla Fútbol Club when they were up against FC Barcelona about 1 ...
According to ScreenRant's article on the matter, a complete list of the actors was available. Combining this with this reddit thread on the matter provides us with the full list below, with directors and writers and their respective roles, and actors and their main/first role (in comment below the one linked). A visual is of the below list is provided at the ...
Simple answer is: Nobody knows.
According to Barack Obama's TARDIS wiki page, the stand-in is uncredited and we never see his face in the episode. However, the voice is genuinely Barack Obama's, it's archive sound taken from an older speech of his.
Your only hope of figuring it out is the BTS Doctor Who Confidential for that episode, called Lords and ...
If you allow TV voice actors, then one of these prolific cartoon voice folks is probably gonna take it. Kevin Michael Richardson, for instance, played:
Ego the Living Planet
Ulik (Avengers Assemble)
Trigon (Teen Titans Go!)
Captain Cold and
Gorilla Grodd (Lego DC Comics Super Heroes: Justice League vs. ...
His name was Bruce Mars, but now he is known as Brother Paramananda, according to the LA Times.
When Brother Paramananda of the Self-Realization Fellowship stepped away from the Material World, he was a young actor named Bruce Mars. Among his roles: a "Star Trek" space cadet whose latent aggression is unleashed on a planet where all subconscious desires ...
Actor is Bruce Mars. He was in three trek episodes. The most famous (and the one you're probably thinking of) is 'Shore Leave' where he played the character Finnegan. According to IMDB, he was also in Assignment Earth as the first policeman and in The Corbomite Maneuver as Crewman #1 (uncredited).
As you stated in your question, he joined the Self-...
In addittion to matte paintings, cardboard figures were also used, notably in the hangar scenes in Return and the ceremony at Yavin.
If you have the old editions, you see this if you look for it, but I'm pretty sure this was replaced in the newer, more CG versions.
Here is a link to two photos from the award ceremony at forum.blu-ray.com. However, ...
According to Wikipedia:
A young version of the character appears in "Listen" (2014), portrayed by an uncredited child actor.
I agree with Richard who said it was likely a relative or family friend of the crew. However they found them, I'm sure if they didn't credit them, they would find it impolite for us to put their name.