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.