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
Geoffrey Cheshire
Ian Fairbairn
Edward Dentith
Clifford Earl
Robert Sidaway
Norman Hartley
James Thornhill
John Levene
Stacy Davies
Sheila Dunn
Murray Evans
Walter Randall
Peter Thompson
Dominic Allan
Pat Gorman
Ralph Carrigan
Charles Finch
John Spradbury
Derek Chafer
Terence Denville
Peter Thornton
Richard King