Season 27, Episode 2 Time Travel

First Aired: October 12, 1999

The possibility of time travel is explored, including how interstellar “wormholes” might be used as time machines in the future. Features comments from Carl Sagan, Stephen Hawking and Kip Thorne. Also: clips from “Contact” and “Back to the Future.” Tony Kahn narrates.

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  • Premiered: March 3, 1974
  • Rating: None
  • Premise: PBS's premier science-documentary series, which has won six Peabody Awards and more than 20 Emmys (four in 2002 alone) since its 1974 debut. `Nova' clearly, and often engagingly, `demystifies' a vast range of science, technology and history topics---past a… (more)

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