Commander Rick examines the use of time travel in science fiction, with SF authors Connie Willis (discussing her latest novel, Doomsday Book), L. Sprague de Camp (Lest Darkness Fall), Michael Moorcock (Behold the Man), Gregory Benford (Timescape), John Gribbin ("Don't Look Back"), Robert Silverberg (co-author with Isaac Asimov of The Ugly Little Boy), Spider Robinson (Time Travelers Strictly Cash), Geoffrey A. Landis ("Ripples in the Dirac Sea") and Joe Haldeman ("The Hemingway Hoax").