John Barrowman

Age: 51

How You Know John: Any fan of Doctor Who or Torchwood will best know Barrowman as the omnisexual time traveller Captain Jack Harkness — but John is also a long-time Broadway and West End veteran, and recently starred in the US as the evil Malcolm Merlyn in Arrow.

Why John is Going In: "I like a challenge, I like a competition and I might make some new friends out of it. To be blunt, it will also be nice to have some 'me' time! Nobody will be able to get in touch, text or email. I know it's a game and I am not going in to be a misery. And I would be over the moon if I won. I would be the King or Queen of the Jungle."

John's Jungle Strategy: "If I see someone being rude, I will stand up for myself."