Revealing Mistake: The psychic wind that blasts through the lab does not upset the coat rack.
After Clegg reads the Brigadier's watch, the Doctor calls him Alastair. This was the first time the Brigadier's first name was revealed on screen.
Revealing Mistakes: When Clegg levitates the tray, the Brigadier's eyes are looking elsewhere as it floats past him.
This story was written to replace another treatment by Robert Sloman titled "The Final Game." Originally, this would feature a climactic battle between The Doctor and his arch-nemesis, The Master. In the final episode, The Master was to save the Doctor's life in an act of redemption only to be killed in an explosion. The death of actor Roger Delgado on 18 June 1973 forced producer Barry Letts to scrap the idea and commission Sloman to write a new script.
To prove his clairvoyant abilities, Professor Clegg uses the Brigadier's wristwatch to glean personal information which no one else could know. His claims that the object was given to the Brigadier eleven years earlier in a hotel room by a woman named Doris was on target, according to his embarassed reaction. In Battlefield, the retired Brigadier is married to a woman named Doris.
Benton: Doctor, I… (He sees Clegg with a strange scientific get-up on his head.) Ah, doing a bit of hair-dressing on the side, eh?
The Brigadier [ of a belly dancer ]: Very fit, that girl. Extraordinary muscular control. Must adapt some of those movements as exercises for the men. The Doctor: They'd take some adapting!
Video: Doctor Who: Planet of the Spiders (BBCV 4491) released in April 1991. Released in U.S.A./Canada (Warner Home Video E1262) in May 1994.
Novelisation: Doctor Who and the Planet of the Spiders by Terrance Dicks (ISBN 0 426 10655 5) first published by Tandem in 1975.
When Professor Clegg holds the Doctor's sonic screwdriver in Part One, we see a clip of the Doctor using it to distract the Drashigs from Carnival of Monsters, Episode Three. A clip of him using it to distract the maggots in The Green Death, Episode Five was supposed to be used too but was dropped.
This story picks up the threads relating to the blue crystal from Metebelis Three (acquired in The Green Death, Episode One) and Mike Yates' departure from U.N.I.T. (following the events in Invasion of the Dinosaurs).
The Doctor: Do you feel up to bending the odd fork? This question from the Doctor is a reference to Uri Geller, a self-proclaimed psychic who gained fame in the 1970s. The highlight of his act was supposedly bending spoons with his mind.
S 26 : Ep 11
Aired 11/15/89
S 26 : Ep 10
Aired 11/8/89
S 26 : Ep 9
Aired 11/1/89
S 26 : Ep 8
Aired 10/25/89
User Score: 21970
User Score: 5522
User Score: 2119
User Score: 528
User Score: 522
User Score: 180
User Score: 151
User Score: 113
User Score: 89
User Score: 88