"Frontios buries its own dead", or so the saying goes. The Doctor, Turlough and Tegan are forced into landing on the remote planet of Frontios, a human colony where deaths go unaccounted for. What lies beneath the surface, dragging its victims down?

• BBC
• Peter Davison
• Janet Fielding
• Mark Strickson
• Jeff Rawle
• Peter Gilmore
• Lesley Dunlop
• William Lucas
• Maurice O'Connell