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.

Science Fiction, Drama, Adventure

Patrick Troughton, Frazer Hines, Wendy Padbury, Kevin Stoney, Nicholas Courtney, Edward Burnham