Michael Denison
as Captain Aubrey Percival
Bernard Hepton
as Det. Chief Supt. Meadows
Juliet Hammond-Hill
as Irene Kohl
Stephen Yardley
as James Drew
Cavan Kendall
as Charles Vivian
Jack McKenzie
as Chief Insp. Perry
Daniel Hill
as Insp. Clark
Gary Whelan
as Danny Connors
Grant Warnock
as Viscount Rupert Fitzcharles
Reg Woods
as Det. Sgt. Summers
Anna Mottram
as WPS Barratt