Sir David puts a raven's memory skills to the test. Can he outwit him?
Where did the legend of the cheetah's speed first come from? Sir David reveals all.
How strong is a flea? Sir David Attenborough looks to a flea circus for the answer.
Agent Bellamy quickly discovers that gathering the returned in the school gym is a trap.
A frustrated Jacob throws a tantrum after his parents stop him from playing outside.
Prepare for an all-out assault as season one reaches its dramatic climax.
Christine brews up an elixir of teas to tickle the tastebuds, but will it taste any good?
See what happened when the Scissor Sister met Christine to set her bewitching challenge.
Christine jokes the team have ruined her life after checking on the bear cakes' progress.
The comedian would like a twist on a teddy bear's picnic. Can the team meet the challenge?
Christine isn't happy with Dave's desert cake and has some strong words to deliver.
Michael Bolton would like a 25th anniversary cake - that can survive in the desert.
Christine isn't happy and takes destructive action on the offending cake.
The Spice Girl tells Christine about the supersized cake she wants for her 40th birthday.
Will 7 out of 10 dogs prefer the cake the Choccy team have created for Joan Rivers' pets?
The late star asks for a diet cake with only 150 calories a slice. Can the team do it?