Sylvia Anderson

Lady Penelope Creighton-Ward/Air Terrainean Guide (voice)

Ray Barrett

USS, Sentinel Commander/Policeman - Site Control/TV Compere (voice)

Peter Dyneley

Jeff Tracy (voice)

Christine Finn

Tin-Tin Kyrano (voice)

David Graham

Gordon Tracy/Brains/ Kyrano/Joe/First Officer Clayton/ 2nd Policeman - Site Control/Police Patrol/Garner

David Holliday

Virgil Tracy (voice)

Shane Rimmer

Scott Tracy/Scanners/Washington

Matt Zimmerman

Alan Tracy/Ned Cook

David Elliott

David Lane