达拉·奥布莱恩

Dara O'Briain

饰：自己 Self

Chris Lintott

饰：Himself

布莱恩·考克斯

Brian Edward Cox

饰：自己

利兹·博宁

Liz Bonnin

饰：Self - Presenter

Marek Kukula

饰：Self - Public Astronomer, Royal Observatory Greenwich

Allan Chapman

饰：Self

Mark Kidger

饰：Self - European Space Agency

乔恩·卡肖

Jon Culshaw

饰：Self

大卫·布林

David Brin

饰：Self - Science Fiction Author

Amy Mainzer

饰：Self - Jet Propulsion Lab

Linda Spilker

饰：Self - Jet Propulsion Lab

Richard Greenwood

饰：Self - Meteorite Expert

Maggie Aderin-Pocock

饰：Self

Walter Cunningham

饰：Self

Joe Gutheinz

饰：Self - Retired NASA OIG Special Agent

乔纳森·罗斯

Jonathan Ross

饰：Self

Lucie Green

Serena Viti

饰：Self

Eugene Cernan

Eugene Cernan

饰：Self

布赖恩·梅

Brian May

饰：Self

Lewis Dartnell

饰：Self - University College London

Adam Steltzner

饰：Self - Lead Engineer, Jet Propulsion Lab

John Grotzinger

饰：Self - Caltech

巴兹·奥尔德林

Buzz Aldrin

饰：Himself