Ηθοποιοί επεισοδίου
Peter DavisonThe Doctor
Nicola BryantPerpugilliam "Peri" Brown
Janet FieldingTegan Jovanka
Mark StricksonVislor Turlough
ניצה שאולKarina
★
Nigel HumphreysBulic
Ian McCullochNilson
Ίνγκριντ ΠιτDr. Solow
James CoombesParoli / Voice of Sentinel Six
Tom AdamsCommander Vorshak
★
Stuart BlakeScibus
★
Martin NeilMaddox
★
Tara WardPreston
Norman ComerIcthar