Sarah Jane and Kettlewell infiltrate an SRS meeting to try and find out what Miss Winters is up to but there is a surprise in store.
Quest roles:
Nicholas Courtney(Brig. Lethbridge-Stewart), Terry Walsh(Doran (uncredited)), Michael Kilgarriff(Second Ogron), John Levene(Sergeant Benton), Edward Burnham(Professor Kettlewell), Alec Linstead(Sgt. Osgood), Patricia Maynard(Miss Winters)