Professor Polonium
Sam / Elvis / Charlie / Norman (voice)
Arnold / James (voice)
Malcolm Williams / Map-Screen 700
Station Officer Steele / Mike Flood / Tom Thomas / Trevor Evans (voice)
Doctor Crumpton (voice)
Rose Revani (voice)
Joe Sparkes (voice)
Penny / Sarah / Bronwyn / Mrs. Chen / Teleprinter / Map-Screen 700 (voice)
Ellie / Bella / Scoop Dooley (voice)
Dilys / Mandy / Helen (voice)
Moose Roberts (voice)
Gareth Griffiths (voice)
