It's difficult the get the question correct in the header:  When the whale probe in 2286 reach Earth and they have to travel back in time , will they travel to the past of their universe ?  If yes , than the second part is not necessary to answer.  If No , could they meet the other crew of the enterprise in the past?  Thanks
7103
Usually, in Star Trek, when there's a timeline change, the indication is that the original timeline is gone and replaced with the new one.  In City on the Edge of Forever, Kirk makes a comment that if they don't get the timeline straight, that millions of people who never died before will die.  Much of the time travel in Trek created suspense by declaring a need to restore the original timeline.  It's already been discussed in other questions about how, in the new movie (simply titled Star Trek with no subtitle or series number) they were unable to restore the original timeline.  While some of this is open to interpretation, it seemed like in this instance, for the first time, in Trek, there was an alternate timeline that was seen as an alternate possibility - no reference was made to it replacing the original timeline.  In this movie, was there any reference to the original timeline still existing?  In this movie, was the original timeline still considered to be intact?
76524
The series "Enterprise" takes place a century before the events of TOS.  Are the things that happened in Enterprise considered canon or would they be a spin-off series of sorts? The specific events I'm speaking of are the temporal cold war, and the storyline of the Xindi wanting to destroy Humanity on behalf of the Sphere Builders.  Is anything that happened during Enterprise considered part of the Star Trek canon or have the creators of Star Trek chosen to pretend it never happened?
49538
In the series finale, Admiral Janeway travels back to 2378 to take Voyager back to Earth. Out-of-universe, of course, this point in time was chosen to fit in with the continuity of the rest of the series. In-universe, however, it seems that Janeway could have chosen any point in time, since she had the ability to travel to and from the Delta Quadrant at will. Is there a reason given, in-universe, for why she chose that particular incident to travel back to?
23749
I once asked a question about the time line of an incredibly complex time travel movie on this site and received some incredibly elegant explanations. I'm wondering if you guys can explain Arrival too.   She learns an alien language which allows her to think in such a way that she knows the future. In the future, an important leader tells her at a world convention that he remembers when she called him on his personal number and got his attention by telling him his wifes dying words.  He then proceeds to give her his cell number and tells her his wife's dying words. In the "past", as she "sees" this "memory" of the future conversation, she uses this number to call him and tells him those words.   How does that work? Mind blown. Is there even a logical way to explain this?
80554
In  Starfleet learns about a culture that we (as audience) know as The Borg. According to TNG, the Federation doesn't seem to know anything about these beings when . Although Archer's crew doesn't learn the name of the Borg, it would be reasonable that the Federation would inherit the information about such a menacing enemy and it would also be reasonable to assume the crew of the Enterprise-D to be able to match their encounter with their databases' information.  Obviously, out-of-universe the explanation is that the scripts weren't written in chronological order, but how can the apparent obliviousness about the Borg be explained in-universe?
124082
I've just read this on the :     The main setting for the films Star   Trek: First Contact (1996), Star Trek:   Insurrection (1998), and Star Trek   Nemesis (2002).[6] According to   Star Trek: Countdown (2009), Data   assumed command of the Enterprise   after Captain Picard retired from   Starfleet to become the Ambassador to   Vulcan.   (emphasis added by me)  I haven't read Star Trek: Countdown, but looking at  I read this:     The comic came about because Anthony   Pascale, editor of TrekMovie.com, kept   requesting to the film's co-writer   Roberto Orci a way of having The Next   Generation characters "pass the baton"   back to the originals. When asked   whether the filmmakers' involvement in   the comic made it canonical, Orci   stated he was in no position to   declare whether it was, though he felt   it could easily remain as such unless   it was contradicted in a future   film.   (emphasis added by me)  How could that ever be canon if Data sacrifices himself during  while saving Picard, still captain of the Enterprise?     Data arrives with a single use personal transporter and has the captain beamed back to the Enterprise before ultimately sacrificing himself to shut down the weapon and destroy the ship.   Am I missing something? Was Data revived? Was Star Trek: Nemesis un-canonized? Was Data of Star Trek: Countdown really B4?
15037
I'm going to assume enough time has passed that the following is not considered a spoiler:  In the second-to-last episode of Stargate Atlantis, we see an alternate universe where Sheppard is a detective.  In the middle of the episode, McKay questions Sheppard as part of an investigation. McKay then says, "You know, I once met another version of you. He was very different."  What exactly is he referring to? As far as I remember, Rodney McKay said he knew his Sheppard when he traveled between universes, so it can't be this one. Which is it?
97824
A group of people are exploring a huge spaceship. They are worried about supplies until they find cubbies that duplicate anything put into them. They discover this by someone placing their hand inside one of the cubbies and it duplicates their hand. Specifically, once something is placed in the cubby, whenever it is removed it is immediately replaced. So there's now always a hand in the cubby.  Definitely True   Everything in the above paragraph Read it more than 10 years ago.   I think...   I read it approximately 15 years ago. I have no idea how old it was when I read it. The ship was discovered in a glacier, or the arctic or something, which was reflected on the cover. It may have not been a spaceship exactly. I think there may have been interdimensional/tranporting doors and they were unable to go back the way they came.   I did not finish the book and would like to now, so I will not be able to answer clarification questions about later plot points and would prefer to avoid spoilers.
107919
In  (the original movie), Marty comes back from 1955 10 mins early to prevent Doc from being shot (which he fails at). He then rolls up to the Lone Pine Mall and sees himself hit 88 mph and shoot back to 1955 (again). Marty then carries on with this life as usual. What happens to the Marty that goes back to 1955 at the end of the film?  This obviously is a recursive problem where it would create another timeline and Marty would keep coming back 10 mins early to view another Marty zip back to 1955?
79363
I'm in trouble with time dilation: Suppose that there's two people on the Earth (A,B), they are twins and each other has a clock. (So they are at the same reference frame). B travels in a spaceship and is orbiting around the Earth, as B's speed has increased there's some time dilation. So it's supposed that if A "looks" to B, B's clock will run slower than A's, and viceversa. And if one day B decides come back to the Earth, he will be younger than his twin and the hour of his clock would be different (earlier than A's clock) because of time dilation.  My first question is, why each person see the other's clock as the slow one? (In fact, I found some information that may solved it but I'm not sure if it's the right answer, and if it is, I don't understand it. -> It's because everyone thinks about himself as the reference frame. In other words, that for B, he is the stationary and who moves is A, so he sees A's clock run slower as B is "stopped" and the same for A. B is who is moving and A the stationary.)  The other question I have is that if it's true that each one sees the other as the slow one there's something that i missed out. We all agree that B (after going to the space and came back to the Earth) he is younger than his brother. So, why B don't see A moving and aging very fast if A see his brother and his things going very slow? Let's imagine they were looking to each other all the time, if both of them see the other going slowly once they meet and "discover" B is the young one... how is that possible?  [I think that in one episode of Cosmos of Carl Sagan (though may be I'm mistaken) he said that a neutrino "borned" in the Big Bang could have seen the creation of the Universe until today in few seconds due to its high speed, here starts my doubts: or i misunderstood something or there's contradictory information]  (I don't know anything about physics, only what is taught at high school as I'm a teenager so it'd be better to answer with no kind of calculation as I'd not understand it.)
76265
What was the galaxy formation Rust saw before confronting Erol Childress in  S01E08?  It was weird like out of the series. I guess it was some sort of hallucination, a product of Rust's madness or addiction.
28567
I remember reading somewhere a theory that  (the being that the Voyager probe had become in Star Trek: The Motion Picture) was somehow responsible for the creation of the Borg.  Is this canonical?  Where does the theory come from?  And how exactly did it go down?
23453
Assuming a Galaxy class starship were to work on a regular schedule (i.e. exploring, diplomatic missions etc. but NO battle), how long can it last before it has to return to a starbase for servicing?  I appreciate this may be difficult finding a series of episodes from TNG where the Enterprise-D does not battle between going to a Starbase, so, if it is absolutely necessary, battle can be included, but no major damage...
97241
I have little recollection when I read this, but it started with people observing indications of some special engine use many lightyears away, and it led them to 'reverse-engineer' the traces to create their own drive.  Had the usual tropes of international crew-selection for first-voyage.  Somewhere in the travel, they encounter a sentient star or quasar.  When they get back hundreds/thousands of years later, they arrive to an uncaring Earth that no longer pursues space-travel.
44342
In Star Trek: Voyager, episode 23 of season 4 (), the episode begins with a civilization unknown until now. They claim to hold the ruins of the USS Voyager, which has otherwise contributed to the history of this civilization in a negative way, whereby Captain Janeway formed an alliance with the enemies of the people in question.  In the historical reconstructions of this event, we see many parts belonging to the ship, such as the Doctor.  This one -- having been deactivated during all these years -- still seems to be several centuries ago. The Doctor is therefore considered as the last "living" witnesses of this war.  The USS Voyager was considered a heavily armed warship with a restless and violent crew. The Doctor has done everything to set the truth about that time, and finally, all ends well, history is approved.  However, what is really going on? In the other episodes, the Doctor is always present, as well as the crew members, and the USS Voyager. At the end of the series, they all return to Earth.  What about this episode that seems to be out of the scope of the story?    I couldn't find any explanation about this episode, except that we could consider it as a separate story, but it doesn't really make sense to put an episode that has nothing to do with it in the middle of the series (even if it's very good and fits in pretty well).  I don't think this question is a duplication of , because this one is about the whole episode, as well as what really happened to the crew.
75608
Based on , someone posted a link to pic of the larger collage of ships the question was based on.    What is the ID of all these ships? Some are quite easy of course, like the Millennium Falcon, USS Enterprise and the TARDIS. But I'm not sure of all of them.   Can someone put numbers on the ships to make the identification easier?
124230
Through the course of the Star Trek franchise, some species have undergone significant changes in their appearance.  For example, here is a Klingon as seen in The Original Series.    And, here is one from The Next Generation.    Quite interestingly, if we go further back into Star Trek universe history, we find that Klingons from before the time of TOS looked much like they did in TNG.  Here's one from Enterprise.    Klingons weren't the only ones who went through this, and it didn't just happen in the transition from TOS to the TNG/DS9/VOY era.  Here's a Trill from an episode in TNG.    And, this is one from DS9.    I'm sure these aren't the only species to have undergone changes like this.  Have there ever been in-universe explanations for these, or others?