Admittedly, I watched Marvel cartoons on ABC Saturday morning as early as 1966, but I was never enamored by them as I was with the comic books. I can list the first time travel in many series—including what I think is the first actual time travel of Spider-Man in any medium—but I have watched only a few.
Hey, listen to this! ‘This is my last entry. I have set the machine to three million B.C. The door will remain open for any who wish to follow.’

Variants

(1)
  1. Marvel, |pending byline| (10 November 1966).