Horizon

Xand van Tulleken

Presenter

Kevin Fong

Himself - Presenter

Helen Czerski

Herself - Presenter

Iain Stewart

Himself - Presenter

Andrew Scott

Narrator

Rupert Penry-Jones

Himself - Narrator

Adrian Lester

Himself - Narrator

Hugo Speer

Narrator

Gabriel Weston

Presenter

Rozina Ali

Herself - Presenter

John Hannah

Himself - Narrator

Alexander van Tulleken

Himself - Presenter

Peter Gibbs

Presenter

Giles Yeo

Presenter

Adam Pearson

Presenter

Chris van Tulleken

Presenter

Daniel Kahneman

Presenter

Toby Macdonald

Presenter

Uta Frith

Presenter

Anne Glover

Herself - Presenter

Dr Zoe Williams

Herself - Presenter

Laura Waters

Herself - Presenter

Tim Berners-Lee

Himself - Interviewed Guest

Julian Assange

Himself - Interviewed Guest

John Hammond

Himself - Presenter

Robert Smith

Himself

Jimmy Carr

Presenter

Alexei Leonov

Self

Carl Sagan

Self

Erich von Däniken

Self

Don Wescott

Narrator

Peter Wilson

Self - Narrator

Professor Brian Cox

Presenter

Jeff Goldblum

James Watson

Tim Pigott-Smith

Francis Crick

Juliet Stevenson

Rosalind Franklin

Alan Howard

Maurice Wilkins

Nicholas Fry

Raymond Gosling

John Moreno

Vittorio Luzzati

Geoffrey Chater

Lawrence Bragg

Lyndon Brook

Erwin Chargaff

Betsy Brantley

Elizabeth Watson

Anthony Benson

John Randall

Michael Mosley

Himself - Presenter / Narrator / Presenter

Alice Roberts

Herself - Presenter / Self - Presenter

Steven Mackintosh

Himself - Narrator / Narrator

Hannah Fry

Herself - Presenter

Joss Ackland

Narrator (voice)

James E. Oberg

Self

Kelly Hunter

Herself - Narrator

Helen McCrory

Narrator

Dr Adam Rutherford

Narrator / Presenter

Liz Bonnin

Presenter / Self - Presenter