
The teams race around a freezing raceworld, answering Kerwhizzitor's questions.

Will Big and Small discover who is eating the funny vegetables in their garden?

Jemima discovers that the school hamster has a taste for adventure.

Ziggy learns about jumping, tumbling and flipping. Sportacus does the Spider Stretch.

Contestants from Leeds do their best to avoid being dropped into the goo portal.

The six warriors face Sunken Treasure, Warrior's Eye and the Pendulum.

Jimmi puts himself in danger when he offers help to a girl whose boyfriend is an ex-con. (R)

Dermot Murnaghan searches for the greatest quiz brain in Britain. (R)

Anita Manning spots an unusual fruit bowl which may have come from Norway. (R)

Ray follows in the footsteps of British pioneer Samuel Hearne on his epic 1,000-mile trip. (R)

Torchwood star John Barrowman and TV presenter Myleene Klass race across southern America. (R)

Jools's guests include Alice in Chains, Steve Martin, Martha Wainwright and Joss Stone. (R)

Horizon investigates speech, a phenomenon unique to humans, which remains a mystery. (R)

Nicola Murray is stuck in an Eastbourne hotel bedroom trying to finish her speech. (R)

Ben Fogle undergoes an intensive course of treatment for a lethal tropical illness. (R)