Day 4: It was the last night in Snake Rock camp.

Everyone was asleep apart from Cerys and Marc who were snuggled up on the bed together, staring at the stars, not realising that infra-red cameras were watching their every move.

Cerys confessed that she liked men to speak in a South African accent, so Marc duly obliged.

There was a period of adjustment later in the day as the teams merged; the karma of Croc Creek was disturbed when Janice and Lynne arrived. Sleeping arrangements were sorted as John and Katie found beds in a clearing and Lynne and Rodney made their way to the treehouse.

Katie left camp to face her biggest challenge - Grave Danger - which saw her hoisted up in a perspex coffin over the ravine, with only 20 thousand nibbling cockroaches for company. She agreed to "take it like a man", managing 10 minutes and earning meals for the whole camp.

Back on land, Katie was greeted by cheers as she returned to her comrades. Lynne showed off her dancing skills, which weren't taken entirely seriously by her new best friend, Rodney.

There was a live trial, and a new celebrity camper in every sense of the word: Christopher Biggins (Biggins to his friends). Janice time-wasted and whimpered through the tasks, as Biggins saved the day and managed to win meals for the team. Covered in slime and cockroaches, Biggins made his way into the camp to meet his fellow celebrities for the first time.