The Doctor, Jamie and Zoe return to Earth and become embroiled in the schemes of Tobias Vaughn. They meet up with an old friend, Colonel (now Brigadier) Lethbridge-Stewart, and some old enemies, the Cybermen.
Patrick Troughton
Frazer Hines
Wendy Padbury
Kevin Stoney
Nicholas Courtney
Edward Burnham
Sally Faulkner
Peter Halliday
