Synopsis: At UNIT headquarters, two operatives are on the job. One has gone missing and the other is calling for evac from a building, when he's attacked and thrown out of the building to his death. Back at HQ, the Brigadier prepares to fly off to Geneva's UN offices for a summit.
Notes: A prelude to "Mark of Mandragora" that reads like a movie's pre-title sequence. The Doctor does not appear.