With the celebration of "Back to the Future Day" on October the 21st 2015 (the day Marty and Doc traveled to in Back to the Future 2) and due to popular demand we're starting a new weekly topic challenge from 2015-10-21 00:00 UTC to 2015-10-28 23:00 UTC asking for questions about the intricacies of time travel in movies and TV-shows. From plot-explanations of weird paradoxa in specific movies to general questions regarding the variants for depicting time travel on the screen.1

Once the challenge is over, we'll tally the results and winners (by question votes) here. Also don't forget to suggest and vote for new topics for our next possible challenge.

1) This might be a rather fuzzy definition of the topic and might thus come with difficulties in assessing the eligible questions, especially since we shouldn't really encourage an over-abundant usage of the tag. But I guess with some reasonable thought put into it and a little leniency, it shouldn't be too difficult to sort out what questions really concentrate on problems inherent to time travel and what are unrelated plot explanation questions.

  • I have a time travel question I'd been planning on asking in Science Fiction & Fantasy. I'm new to both communities, but since time travel is inherently a science fiction device, I'm probably not the only one with this question: I assume that most of these questions would normally go on the other site, but are okay during this challenge. Is that correct?
    – Josh
    Oct 21, 2015 at 17:58
  • 1
    @Josh It is entirely up to you where you ask the question. They would not normally be moved over there as long as they are on-topic here. No on-topic question is ever going to be migrated, disregarding any challenges running. In general, on-topic questions are always ok and challenges won't ever change that. On the other hand if the question is off-topic in the first place, the challenge won't change that either. A challenge does always come with the implied requirement that the question has to be on-topic on the site. So the decision is entirely up to you if it is on-topic on both sites.
    – Napoleon Wilson Mod
    Oct 21, 2015 at 18:00
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    @Josh For more information on the matter, take a look at this related general question: meta.movies.stackexchange.com/q/2/49, as well as this one for some possible guidance on making a decision: meta.movies.stackexchange.com/q/376/49.
    – Napoleon Wilson Mod
    Oct 21, 2015 at 18:07

1 Answer 1


The challenge and the only and thus top-voted question (with a score of 4 and ~40 views) was asked by Josh, which makes him the winner of this challenge:

1. Track all changes to the timeline in the Terminator series

(In retrospect it might have been better to open the challenge towards any kind of question about movies/TV-shows featuring time-travel, since there were some really good ones, some even motivated by the challenge itself. But alas, this wasn't done, you can blame that on me as a wrong decision.)

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