Tom Baker
— Tom
Douglas Adams
— Self
Hans Peter Brandmo
— Self
Ted Nelson
— Self
Amanda Goodenough
— Self
Fabrice Florin
— Self
Steve Gano
— Self
Mike Naimark
— Self
Kristee Kreitman
— Self
Kristine Hooper
— Self
Brad DeGral
— Self
Francis Crick
— Self (archive footage)
James Watson
— Self (archive footage)
Michael Wahrman
— Self