The Doctor - Peter Davison
Peri - Nicola Bryant
Turlough - Mark Strickson
Voice of Kamelion - Gerald Flood
Amyand - James Bate
Curt - Michael Bangerter
Lomand - John Alkin
Lookout - Simon Sutton
Malkon - Edward Highmore
Professor Howard Foster - Dallas Adams
Roskal - Jonathan Caplan
Sorasta - Barbara Shelley
The Master - Anthony Ainley
Timanov - Peter Wyngarde
Zuko - Max Arthur