With just 24 hours until the comet crashes into Earth, the race to reach the bunker is on. Plus, the results of Operation Saviour are revealed to the world.

Cast: Maisey Bawden, Mathew Baynton, Patricia Bright, Max Brown, Andrew Byron, Karla Crome, Jenna Fischer, Oliver Ford Davies, Joel Fry, Bronagh Gallagher, Christopher Goh, Rebecca Herszenhorn, Alana Hood, Anthony Howell, Anna Jones