The Doctor’s regeneration and recovery come at an inopportune time for the Brigadier, who has to try to solve a series of crimes related to the top-secret plans for a disintegrator gun. Sarah, researching a story about the equally top-secret Think Tank organization, is introduced to a gigantic robot which could be the perpetrator of the thefts and killings – despite the scientists’ horrifying demonstration that the robot could not kill Sarah. The Doctor, recovering slowly and aggravating the Brigadier with his unpredictable new personality, discovers that the Think Tank scientists are doing much more than research – they’re planning on taking over the world and culling the human herd of those not up to genius standards.
Season 12 Regular Cast: Tom Baker (The Doctor), Elisabeth Sladen (Sarah Jane Smith), Ian Marter (Harry Sullivan)
written by Terrance Dicks
directed by Christopher Barry
music by Dudley Simpson
Guest Cast: Nicholas Courtney (Brigadier Lethbridge-Stewart), John Levene (RSM Benton), Edward Burnham (Professor Kettlewell), Alec Linstead (Jellicoe), Patricia Maynard (Miss Winters), Michael Kilgarriff (Robot), John Scott Martin (Guard), Timothy Craven (Short), Walter Goodman (Chambers)
Broadcast from December 28, 1974 through January 18, 1975
LogBook entry & review by Earl Green […]