First broadcast 16th August 1974.
A popular member of the Oxford community is killed, and nobody can think why.
Stanley Baker - Detective Inspector Jamieson
Denis Lill - Sgt. Beck
David Swift - Insp. Havelock
Derek Francis - Octavius Lamb
Barbara Leigh-Hunt - Madeleine
Simon Fisher-Turner - Steven (as Simon Turner)
Peter Sallis - Lloyd
Artro Morris - Mr. Humber
Gillian Raine - Miss Bennett
Michael Hawkins - Bardon
Ingrid Hafner - Mary
Bruce Boa - Professor Friedland
Cyril Shaps - Mr. Lavender
Shelagh Wilcocks - Mrs. Lavender
Honora Burke - Mrs. Bute
John Challis - Casson
Anthony Roye - Doctor Robson
Ève Karpf - Miss Compton
Anthony Bailey - Sgt Latimer
Miles Anderson - P.C. Hanworth
Dennis Blanch - P.C. York
Cheryl Hall - Amy
Colin Edwynn - Michael
Mona Hammond - Nurse
Melinda Sheridan - Receptionist
