Les briefly forgets that Roy Kinnear isn't playing in the third round.
Around the 11'20m mark, Les's gesticulating sees him accidentally hit Roy Kinnear on the head. Roy plays up the event, pretending to be knocked unconscious.
Samantha Fox appears to brush her desk microphone with her answer cards on a few occasions, causing a distortion sound.
Around the 26 second mark, a crew member can be seen on the right-hand side of the screen, moving back into the set.