Self - Presenter (as Dr Thomas Dixon)
Self - University of California, Santa Cruz (archive footage) (as Prof Anthony Aguirre)
Self (archive footage)
Self - The University of Manchester (archive footage) (as Prof Brian Cox)
Self - Southeastern Louisiana University (archive footage) (as Prof Barbara Forrest)
Self - University of Chicago (archive footage) (as Prof Leon Lederman)
Self - Brown University (archive footage) (as Prof Kenneth Miller)
Self - University of Pennsylvania (archive footage) (as Dr. Andrew Newberg)
Self - Laurentian University (archive footage) (as Dr Michael Persinger)
Self - Narrator (archive sound) (uncredited)