On screen
Cast
15 credited performers
Jon Pertwee
The Doctor
Katy Manning
Jo Grant
David Troughton
Peladon
Geoffrey Toone
Hepesh
Artwork unavailable
Henry Gilbert
Torbis
Artwork unavailable
Alan Bennion
Izlyr
Sonny Caldinez
Ssorg
Artwork unavailable
Stuart Fell
Alpha Centauri
Ysanne Churchman
Alpha Centauri (voice)
Nick Hobbs
Aggedor
Artwork unavailable
Murphy Grumbar
Arcturus
Artwork unavailable
Terry Bale
Arcturus (voice)
Artwork unavailable
Gordon Stothard
Grun
Artwork unavailable
George Giles
Guard Captain
Wendy Danvers
Amazonia