Written by Derrick Sherwin (from a story by Kit Pedler)
"They're from another world. Inhuman killers."
| Episode Title | Premiere Date |
| Episode 1 | 02/11/1968 |
| Episode 2 | 09/11/1968 |
| Episode 3 | 16/11/1968 |
| Episode 4 | 23/11/1968 |
| Episode 5 | 30/11/1968 |
| Episode 6 | 07/12/1968 |
| Episode 7 | 14/12/1968 |
| Episode 8 | 21/12/1968 |
Investigating the disappearance of an eminent scientist, the Doctor and his companions follow his trail to the London headquarters of International Electromatics, a global supplier of electronic equipment run by the formidable Tobias Vaughan. Teaming up with the newly-formed United Nations Intelligence Taskforce — UNIT — under the command of Brigadier Lethbridge-Stewart, it soon becomes apparent that Vaughan is working to his own sinister agenda. As Cybermen invade in cities all over the world, can the Doctor convince Vaughan to help him defeat their plan for global domination?
Cast & Crew
The Doctor: Patrick Troughton
Jamie McCrimmon: Frazer Hines
Zoe Heriot: Wendy Padbury
Brigadier Lethbridge-Stewart: Nicholas Courtney
Tobias Vaughn: Kevin Stoney
Isobel: Sally Faulkner
Professor Watkins: Edward Burnham
Packer: Peter Halliday
Benton: John Levene
Producer: Peter Bryant
Director: Douglas Camfield
Scriptwriter: Derrick Sherwin (from a story by Kit Pedler)
