John Gregson

Commander George Gideon

Alexander Davion

Chief Insp. David Keen

Daphne Anderson

Kate Gideon

Richard James

Matthew Gideon

Giles Watling

Malcolm Gideon

Reginald Jessup

Det. Supt. Lemaitre

Basil Dignam

Commissioner Scott-Marle

Hugh Ross Williamson

Det. Chief Supt. Joe Bell

Richard Davies

The Postman

Andrea Allan

Pru Gideon

Glyn Houston

Sgt. Carmichael

Kay Walsh

Harriet Bright

Sue Lloyd

Mary Henderson

Allan Cuthbertson

Major Donald Ross

Peter Reeves

Scooter Salesman

John Creasey