A group of gold-skinned aliens known as the Axons land on Earth and offer wondrous technology in exchange for fuel. The Doctor, however, isn't fooled, uncovering the Axons' true nature and once again facing his archenemy the Master...
Jon Pertwee
as The Doctor
Katy Manning
as Jo Grant
Nicholas Courtney
as Brigadier Lethbridge-Stewart
Richard Franklin
as Captain Mike Yates
John Levene
as Sergeant Benton
Roger Delgado
as The Master
Paul Grist
as Bill Filer
Peter Bathurst
as Chinn
Fernanda Marlowe
as Corporal Bell
Donald Hewlett
as George Hardiman
David Savile
as Winser
Derek Ware
as Pigbin Josh
