Doctor Who: The Underwater Menace

The TARDIS arrives on an extinct volcanic island. Before long, the travellers are captured and taken into the depths of the Earth, where they find a hidden civilisation — the lost city of Atlantis.

• Director: Julia Smith
• Cast: Patrick Troughton, Anneke Wills, Michael Craze, Frazer Hines, Joseph Fürst, Colin Jeavons, Noel Johnson, Tom Watson