Douglas Camfield
Tom Baker
Elisabeth Sladen
饰:Harry Sullivan
Nicholas Courtney
饰:Brigadier Lethbridge Stewart
Lillias Walker
饰:Sister Lamont
Angus Lennie
饰:Angus
饰:Munro
饰:Zygon
饰:Duke of Forgill
饰:RSM Benton
饰:The Caber
Tony Sibbald
饰:Huckle
Bruce Wightman
饰:Radio Operator
Sydney Newman
Nigel Curzon
James Acheson
George Gallaccio