The almighty Fred Harris stars as the man who arranges the blocks for Chockablock, a machine built by the ancient Atlanteans for no discernible purpose except demanding things that rhyme and getting five year olds to want those weird little yellow buggies. This is an episode themed around clocks - and, naturally, things that rhyme with them.
Features a unique opportunity to hear Fred Harris delightedly shouting "Oh, cock!" at pre-school watchers.