The Mind of Evil
The Doctor and Jo pay a visit to Stangmoor Prison to witness a test of a revolutionary new device that promises to reform criminals permanently by entirely extracting the evil impulses from their brains. But in this case, the test subject – a hardened convict named Barnham – is not only relieved of the darkness in his mind, but most of his mind’s contents as well, rendering him mentally childlike. Not long afterward, Professor Kettering, checking the machine to find out why it overreacted so harshly, dies mysteriously. The Doctor becomes increasingly suspicious and decides to close off the room and check the Keller device himself…only to realize – too late – that it’s an alien life form that feeds on fear, that his arch enemy is behind its presence on Earth, and that the device is only a small part of a much larger plan to plunge the world into chaos.
written by Don Houghton
directed by Timothy Combe
music by Dudley SimpsonGuest Cast: John Levene (Sergeant Benton), Richard Franklin (Captain Yates), Eric Mason (Green), Roy Purcell (Powers), Raymond Westwell (Governor), Simon Lack (Professor Kettering), Michael Sheard (Dr. Summers), Bill Matthews, Barry Wade, Dave Carter, Martin Gordon, Leslie Weekes, Tony Jenkins, Les Conrad, Les Clark, Gordon Stothard, Richard Atherton (Officers), Neil McCarthy (Barnham), Clive Scott (Linwood), Fernanda Marlowe (Corporal Bell), Pik-Sen Lim (Chin Lee), Kristopher Kum (Fu Peng), Haydn Jones (Vosper), William Marlowe (Mailer), Tommy Duggan (Alcott), David Calderisi (Charlie), Patrick Godfrey (Cosworth), Johnny Barrs (Fuller), Matthew Walters (Prisoner), Paul Blomley (Police Superintendent), Maureen Race (Student), Nick Hobbs (American aide), Billy Horrigan (UNIT corporal), Peter Roy (Policeman), Michael Ely (UNIT chauffeur), Francise Williams (African delegate/Master’s chauffeur), Laurence Harrington (Voices), Paul Tann (Chinese aide), Jim Delaney (Passer-by), Charles Saynor (Commissionaire), Basil Tang (Chinese chauffeur), Richard Atherton (Police Inspector)
Broadcast from January 30 through March 6, 1971
LogBook entry & review by Earl Green
Cast: James Hazeldine (David), Carol Drinkwater (Mary), Andrew Ellams (Matthew), Zoe Hart (Polly), Colin McCormack (Alan), Penny Brownjohn (Phyl), Devin Stanfield (Colin), Kathleen Cotty (Emma), Glynis Brooks (Chocky’s voice)
Cast: John D. LeMay (Ryan Dallion), Wendy Robey (Mickey Foster), Chris Wiggins (Jack Marshak), Ray Walston (Jay Star), David Hewlett (Cal), Bob Aarrons (Charlie), Michelle George (Mrs. Forbes), Jennifer Griffin (Linda), David Clement (Carmine), Anthony Bekenn (Mrs. Briggs)
the age of 20; Hewlett would later become much better known as laconic Stargate project scientist Dr. Rodney McKay, a recurring guest so popular on 
Gregory Stark has problems. The Portland executive has lost his keys – and someone’s blackmailing him out of millions of dollars. To solve both cases, which he believes are connected, he hires the world’s foremost private investigator, Darryl Zero. Zero is a reclusive enigma, seldom (if ever) venturing outside of his heavily-protected home, and interacting with his clients through his confidant, Steve Arlo. But in this case, Zero has to interact with the real world, leaving L.A. to travel up the Pacific coast looking for clues. As it turns out, Stark doesn’t just have troubles – he is trouble. And Darryl Zero faces the worst possible obstacle to his legendary detachment from the rest of the human race: he’s falling in love with the chief suspect.
Liz Shaw looks back on her days with UNIT and the Doctor, recalling an adventure that began with the disappearance of several prominent scientists. The Doctor and the Brigadier are on the case, and Liz goes undercover to see if a suspicious dentist’s office has any connection to the disappearances. The Doctor figures out that the Cybermen are once again trying to stage a quiet takeover of the human race…and Liz herself may be the next victim of their new conversion process.
Spring: The Doctor and Nyssa, at the behest of the Time Lords, visit a world where bipedal birds are the dominant life form – and a rogue Time Lord has installed himself as their ruler, accelerating their technological progress dramatically. The Doctor knows that causing his fellow Time Lord to regenerate would confuse the locals and break his hold, but it seems that his actions have been anticipated…
When the Republic loses contact with their troops on Orto Plutonia, Obi-Wan Kenobi and Anakin Skywalker are sent with their troops to learn what has become of them. They find mass destruction of not only the clones, but also a Seperatist droid base, leading the Jedi to conclude that they are dealing with something other than Seperatist activity. Chairman Cho, leader of nearby Pantora is more concerned about maintaining Pantora’s sovereignty over the planet. The Jedi must determine the nature of the hostile force on Orto Plutonia and whether they have a claim to the planet stronger than Pantora’s.