Carl Sagan greets which time travel movie as the most accurate?
Star Trek IV: The Voyage Home
Back to the Future II
Donnie Darko  Which early video game console offered perfect arcade-to-home game ports?
Answer: Back to the Future II
Carl Sagan was a big fan of the sci-fi genre and especially fond of films that addressed difficult to navigate material such as time travel. It was with this in mind that he canceled the series Back to the Future in particular Back to the Future II . Sagan told Robert Zemeckis and Bob Gale, director / writer and co-writer of the films, that Back to the Future II was the most accurate film ever based on the science of time travel and did exceptional work with the problem of the multiple timelines created by multi-trip time travel.
Bonus Trivia: the name of Sagan appears in the video game Back to Future . After finding himself in 1931, Doc takes the alias Carl Sagan.