Comics where time travel is involved in one way or another is a recurring theme in xkcd, as a sub part of all the comics that in general references time. Given the many paradoxes that can arises as soon as some kind of time travel is involved there are many possibilities for interesting comics.
Below is a list of comics that deals with time travel.
This category has the following 3 subcategories, out of 3 total.
Pages in category "Time travel"
The following 29 pages are in this category, out of 29 total.