Ηθοποιοί επεισοδίου
Jon PertweeThe Doctor
Katy ManningJo Grant
David TroughtonPeladon
Geoffrey TooneHepesh
Ysanne ChurchmanAlpha Centauri (voice)
★
Stuart FellAlpha Centauri
Sonny CaldinezSsorg
★
Alan BennionIzlyr
★
Terry BaleVoice of Arcturus (voice)
★
Gordon StothardGrun
Nick HobbsAggedor
★
George GilesGuard Captain
★
Murphy GrumbarArcturus