The Great Egg Race

Teams have to operate a typewriter is in a locked room so all the operation has to be done through the keyhole.

Dismantle a Citroen 2CV and construct a new vehicle that runs without petrol and can be carried by and carry the team members. Thus Professor Heinz Wolff sets another task for 'The Great Egg Race' contestants. Jock Smith is the guest judge in this episode from the fifth series. Jock Smith, winner of 'The Great Egg Race' in 1980, featured in a few subsequent series as a guest judge.

Teams have to design and build a combination lock that will defy their opponents picking abilities.

Teams attempt to make craft that, even if they cannot carry animals, can at least fly - a bit. The programme includes a radio-controlled helicopter, a glider, an autogyro, a plane, and recalling that first flight of 1783, a hot-air balloon.

Teams have to build a submarine that will submerge in a tank of water, travel under and island and resurface.

Teams have to light the light at Battersea Power Station and make one of the giant meters register.

Teams have the task of building a projector.

Teams must construct a vehicle that will race down a bumpy track carrying an egg in the bowl of a dessert spoon.

Teams must measure the height of Battersea Power Station's chimneys.