The Joke Machine
Jarred Christmas (as The Joke Master)
Liberty Bell Productions for CBBC, 26 May to 15 October 2014 (50 episodes in 1 series)
The Joke Master beams children from two primary schools onto his spaceship, and asks them to tell their funniest joke. Good jokes are cheered, ones he doesn't like are subject to a comedy forfeit. Whichever school impresses him more is declared the winner.
The structure - children delivering setup-and-punchline - ensures the show keeps moving, and comedy ejections evoke the spirit of Monty Python. The show runs for just 5 minutes and never outstays its welcome.