Name	Known for
Jon Pertwee Doctor Who Doctor Who See fewer	Doctor Who (1963)
Katy Manning Jo Grant Jo Grant See fewer	When Darkness Falls (I) (2006)
David Troughton Peladon Peladon See fewer	Crime and Punishment (1979)
Geoffrey Toone Hepesh Hepesh See fewer	Zero Hour! (1957)
Alan Bennion Izlyr Izlyr See fewer	Doctor Who (1963)
Sonny Caldinez Ssorg Ssorg See fewer	Raiders of the Lost Ark (1981)
Stuart Fell Alpha Centauri Alpha Centauri See fewer	Lifeforce (1985)
Ysanne Churchman Voice of Alpha Centauri (voice) Voice of Alpha Centauri (voice) See fewer	Othello (1956)
Murphy Grumbar Arcturus Arcturus See fewer	Doctor Who (1963)
Terry Bale Voice of Arcturus (voice) Voice of Arcturus (voice) See fewer	Stage 2 (1971)
George Giles Guard Captain Guard Captain See fewer	Hamlet (1996)
Gordon Stothard Grun (as Gordon St Clair) Grun (as Gordon St Clair) See fewer	Doctor Who (1963)
Nick Hobbs Aggedor Aggedor See fewer	Wonder Woman (2017)
Michael Stevens Guard (uncredited) Guard (uncredited) See fewer	UFO (1970)
Chris Webb Guard (uncredited) Guard (uncredited) See fewer	Lifeforce (1985)