Режиссер: Douglas Camfield
Tom Baker
The Doctor
Элизабет Слейден
Sarah Jane Smith
Ian Marter
Harry Sullivan
Nicholas Courtney
Brigadier Lethbridge-Stewart
John Levene
RSM Benton
John Woodnutt
Duke of Forgill / Broton
Keith Ashley
Zygon
Ronald Gough
Lillias Walker
Sister Lamont
Angus Lennie
Angus
Tony Sibbald
Huckle
Hugh Martin
Munro
