Stephen Hawking

Self

Acting

Isobel Hawking

Self - Stephen Hawking's Mother

Acting

Janet Humphrey

Self - Stephen Hawking's Aunt

Acting

Mary Hawking

Self - Stephen Hawking's Sister

Acting

Basil King

Self - Childhood Friend

Acting

Derek Powney

Self - Oxford Classmate

Acting

Norman Dix

Acting

Robert Berman

Self - Stephen Hawking's Tutor

Acting

Gordon Berry

Acting

Roger Penrose

Acting

Dennis Sciama

Acting

John Archibald Wheeler

Acting

Brandon Carter

Acting

John R. Taylor

Acting

Kip Thorne

Acting

Don Page

Acting

Christopher Isham

Acting

Brian Whitt

Acting

Raymond Laflamme

Acting