Tim Boon

饰：Self,(as Dr Tim Boon)

Tim Hunt

饰：Self,(as Dr Tim Hunt)

Chris Lintott

饰：Self,(as Dr Chris Lintott)

Steve Mould

饰：Self

尼尔·阿姆斯特朗

Neil Armstrong

饰：Himself

大卫·爱登堡

David Attenborough

饰：Himself

吉姆·艾尔-哈利利

Jim Al-Khalili

饰：Himself

Johnny Ball

饰：Himself

Colin Blakemore

Colin Blakemore

饰：Himself

帕特里克·摩尔

Patrick Moore

饰：Himself

金·纽曼

Kim Newman

饰：Himself

罗伯特·韦伯

Robert Webb

饰：Self - Narrator,

Kit Pedler

Kit Pedler

饰：Self,(archive footage) (as Dr Christopher 'Kit' Pedler)

托尼·罗宾逊

Tony Robinson

饰：Self

伊安·斯图瓦特

Iain Stewart

饰：Self,(as Prof. Iain Stewart)

William Woollard

饰：Self

利兹·博宁

Liz Bonnin

饰：Self

迈克尔·莫斯利

Michael J. Mosley

饰：Self,(as Dr Michael Mosley)

Maggie Philbin

饰：Self

西蒙·辛格

Simon Singh

饰：Self,(as Dr Simon Singh)

Robert Winston

饰：Self