Revealing mistake: When the robot refuses to let Paul and Barry through, they attempt to go under his arms but they are thrown aside. It is obvious dummies are used, because of their floppy features and blank faces.
Chucklevision (1987)
1 revealing mistake in Run Robot Run - chronological order
Starring: Barry Chuckle, Brian Patton, Jimmy Patton, Paul Chuckle
Visible crew/equipment: In the the episode "In-console-able" from series 19, in the kitchen when Paul accidentally puts custard and hundreds of thousands on a dinner, he puts the lid on it and when the camera zooms in you can see a cameraman with a camera recording and Barry getting ready for his take.
More trivia for Chucklevision