"Meltdown" is the sixth, and final, episode of science fiction sitcom Red Dwarf Series IV and the twenty-fourth episode in the series run. It was first broadcast on the British television channel BBC2 on 21 March 1991. Written by Rob Grant and Doug Naylor, and directed by Ed Bye, the episode, featuring Wax-Droids of famous historical figures involved in a war of good versus evil, was originally supposed to open the series but was postponed due to the Gulf War conflict.