利兹·博宁

Liz Bonnin

饰：自己

爱丽丝·罗伯茨

Alice Roberts

饰：Self - Presenter

方凯文

Kevin Fong

饰：Self,(as Dr Kevin Fong)

伊安·斯图瓦特

Iain Stewart

饰：Self,(as Prof Iain Stewart)

Jonathan Betts

饰：Self - Royal Observatory, Greenwich

Saleyha Ahsan

饰：Self,(as Dr Saleyha Ahsan)

Helen Czerski

饰：Self,(as Dr Helen Czerski)

迈克尔·莫斯利

Michael J. Mosley

饰：Self