Denise Van Outen

Character: Professor Polonium

Steven Kynman

Character: Sam / Elvis / Charlie / Norman (voice)

John Hasler

Character: Arnold / James (voice)

Colin McFarlane

Character: Malcolm Williams / Map-Screen 700

David Carling

Character: Station Officer Steele / Mike Flood / Tom Thomas / Trevor Evans (voice)

Kerry Shale

Character: Doctor Crumpton (voice)

Sasha Behar

Character: Rose Revani (voice)

Alex Lowe

Character: Joe Sparkes (voice)

Tegwen Tucker

Character: Penny / Sarah / Bronwyn / Mrs. Chen / Teleprinter / Map-Screen 700 (voice)

Harriet Kershaw

Character: Ellie / Bella / Scoop Dooley (voice)

Su Douglas

Character: Dilys / Mandy / Helen (voice)

Nigel Whitmey

Character: Moose Roberts (voice)

Gary Andrews

Character: Gareth Griffiths (voice)