Doctor Who: The Time Warrior
One of the most popular shows in British TV history, this long-running, shoestring-budgeted sci-fi saga followed the exploits of "the Doctor," a maverick scientist and adventurer who traversed space and time in the TARDIS, a high-tech craft disguised (well, stuck, actually) as a London police box. William Hartnell, Patrick Troughton, Jon Pertwee, Tom Baker, Peter Davison, Colin Baker, and Sylvester McCoy starred as the various eccentric incarnations of the Doctor during the series's initial 1963-1989 run.
An alien warlord, stranded in medieval England, is kidnapping scientists from the 20th century to help repair his ship. Can the Doctor (Jon Pertwee) and Sarah Jane defeat this cross-time caper?