Season 2

Peter Dyneley

Jeff Tracy

6 episodes

Matt Zimmerman

Alan Tracy (voice)

6 episodes

Shane Rimmer

Scott Tracy

6 episodes

Ray Barrett

John Tracy

6 episodes

Sylvia Anderson

Lady Penelope Clayton Ward

6 episodes

David Holliday

Virgil Tracy (voice)

6 episodes

David Graham

Gordon Tracy, Brains (voice)

6 episodes

Christine Finn

Tin-Tin Kyrano (voice)

6 episodes

Jeremy Wilkin

6 episodes

Ray Barrett

, Jansen (voice), Atom Sub Reefer Captain, TV Reporter (voice)

5 episodes

Peter Dyneley

4 episodes

Sylvia Anderson

4 episodes

Charles Tingwell

3 episodes

Christine Finn

2 episodes

Matt Zimmerman

Franklin, Gutierrez (voice), Atom Sub Reefer Lieutenant (voice)

2 episodes

John Tate

McColl, Security Guard (voice) (uncredited), Frank Hooper, Sir Harry (voice) (uncredited)

2 episodes

Paul Maxwell

1 episode

Desmond Saunders

Director

3 episodes

Brian Burgess

Director

2 episodes

David Elliott

Director

1 episode

Tony Barwick

Writer

2 episodes

Alan Pattillo

Writer

2 episodes

Donald Robertson

Writer

1 episode

Alan Fennell

Writer

1 episode

Reg Hill

Producer

6 episodes