Horizon

Richard Branson

Acting

Nicholas Soames

Acting

Bob Brier

Acting

Robert Winston

Acting

Robert Gallo

Acting

Trevor R. Bryce

Acting

Joshua Wurman

Acting

Bill Paterson

Acting

Michio Kaku

Acting

Lori Schappell

Acting

Gary England

Acting

Reba Schappell

Acting

Kelly Hunter

Herself - Narrator

Andrew Scott

Narrator

Helen McCrory

Narrator

Rupert Penry-Jones

Himself - Narrator

Adrian Lester

Himself - Narrator

Dr Adam Rutherford

Presenter