The film includes interviews with celebrities and other influential people who support the work of these controversial speakers, including:

Ricky Gervais
Woody Allen
Cameron Diaz
Stephen Hawking
Sarah Silverman
Bill Pullman
Werner Herzog
Tim Minchin
Eddie Izzard
Ian McEwan
Adam Savage
Ayaan Hirsi-Ali
Penn Jillette
Sam Harris
Dan Dennett
James Randi
Cormac McCarthy
Paul Provenza
James Morrison
Michael Shermer
David Silverman
...and more.

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