Rasmus Hardiker

Scott Tracy / Alan Tracy (voice)

Chris Jarman

The Mechanic / Hutch (voice)

David Menkin

Virgil Tracy / Gordon Tracy (voice)

David Graham

Parker / Vic (voice)

Sandra Dickinson

Grandma Tracy (voice)

Jenna Coleman

Baines (voice)

Adjoa Andoh

Colonel Casey (voice)

Thomas Brodie-Sangster

John Tracy (voice)

Angel Coulby

Kayo (voice)

Kayvan Novak

Brains / GDF Commander (voice)

Rosamund Pike

Lady Penelope (voice)

Teresa Gallagher

EOS (voice)

Tom Rosenthal

Brandon Berrenger (voice)

Jack Whitehall

Francois Lemaire (voice)

Reece Pockney

Paul Travers (voice)

Mark Gatiss

Dr. Quentin Questa (voice)

Asa Butterfield

Space Controller Conrad (Voice)

David Tennant

Tyco Reeves (Voice)

Emilia Clarke

Doyle (Voice)

Sylvester McCoy

Aezethril the Wizard (voice)

Lee Majors

Jeff Tracey (voice)

Mathew Baynton

Jimmy (voice) / Crewman Hooper (voice)

Massimo Marinoni

Banino (voice)

Taj Atwal

Madeline Lemaire (voice)