The Vikings, a team of Dark Ages battle re-enactment enthusiasts from Salisbury, face off against the Beach Bums, a team of surfers from Torquay, to construct a machine which can hurl a human-sized mannequin into a disused quarry.

The Engineering Eggheads, a team of mechanical engineering students from University College London, compete with the Diggers, a team of heavy plant engineers from Hull, to build 5m-long "monster" trikes, that can race head-to-head over a slalom course, carrying all four team members.

Plymouth's Super Subs vie with Sweet Chariots, a group of rugby players, to construct a train they has powered by the teams muscle.

Suffolk builders The Cement Mixers, and Dorset cab drivers The Turbo Taxis build and race snowmobiles.

In this episode The Extinguishers must face The Steaming Scots to see who can build the better Giant Skateboard.

In this episode Woof Justice take on The Bus Boys in a race to create the most accurate and more mobile Mechanical Mortars.

In this episode The Beach Bums face The Diggers to see who can build the better Airboat.

This week The Turbo Taxi's and The Super Subs have to make mechanical sumo cars that are capable of pushing the other teams vehicle out of the arena.

In the first semi-final the Beach Bums face the Extinguishers to see who can make the best machine capable of moving mounds of earth.

In the second semi-final Woof Justice face the Turbo Taxi's for a place in the final by building the fastest Drag Sled.

In the final of this series Woof Justice take on the Beach Bums to see who can make the better swamp racer and become the Scrapheap Challenge champions 2007.

In the Grand Final, this series' winners Woof Justice take on last series' winners the Powerlifters to build Bulldozers from scrap.

In this Scrapheap special a team from the UK faces a team from the US to make Paddle Boats from scrap to commemorate the maritime achievements of Isambard Kingdom Brunel.

16 teams fight to make the best vehicles out of anything they like so expect some rather silly looking vehicles.

In this episode the Scrapheap Roadshow moves on and Welly Wanging is the objective and once again 16 teams battle it out to face the Scrapheap All-Stars.

Robert and Lisa present a look at the highlights of this years series.