When Marty travels back to the future, why are not there two of him in 1985? Or they indeed are?
61795
What happens to the second Marty at the end of Back to the Future?
38796
How come SG-1 couldn't get back to Earth?
36075
Identifying a short story about time travel and paradoxes
59967
Star Trek Series Episode (I think) where crew get stuck in a time warp and have to wait several years to warn their past selves to set it right?
95295
Is the Universe Past-Eternal?
49202
Why didn't Doc remember Marty's outfit?
107430
Can't the Doctor just land the TARDIS outside New York during 1938?
48497
Doesn't entropy increase backwards in time, too?
91051
Older science fiction book about time travel to retrieve things but they went sideways through the dimensions instead
96055
Finding a book with a man from the future being reincarnated on Earth in past times
139987
Special Relativity, 2nd Postulate -- Why?
98455
Twin Paradox: Still a Paradox?
126366
Two Timelines, (Almost) Same Event, but Several Years Apart?
89776
Why was the DeLorean in Back To The Future not always covered in ice after time travel, and why didn't it fly in 1885?
80925
Why can't a Federation Starship's transporter history be used to bring someone back to life?
108569
Time dilation - why the observers see each other the slow one but then one of them is older or younger?
123946
Why didn't Doctor Strange wind back the clock way before Thanos got any of the Infinity Stones?