Richard Dawkins as Self

Lawrence Krauss as Self

Ayaan Hirsi Ali as Self

Woody Allen as Self

Cameron Diaz as Self

Ricky Gervais as Self

Stephen Hawking as Self

Penn Jillette as Self

Eddie Izzard as Self

Werner Herzog as Self

Daniel C. Dennett as Self

Sam Harris as Self

Sarah Silverman as Self

Cormac McCarthy as Self

Tim Minchin as Self

Bill Pullman as Self

Adam Savage as Self

James Randi as Self