Hosted by former EastEnder Danny Dyer, Channel 4's Scared of the Dark see eight famous faces living, eating and sleeping in complete darkness. The psychological experiment looks at the mounting the pressures of light deprivation as they carry out a number of tasks.
If they fail, they lose their privileges, and life is made even harder. If they win, they get treats and time in the light. If at any time they feel too terrified and can't continue, they can stop the challenge or leave the show by saying 'I'm scared of the dark'.
For those strong enough to endure 180 hours in the dark, a peer-to-peer vote will determine the winner.