A popular member of the Oxford community is killed and nobody figure out why. A police inspector is called in from Scotland Yard and discovers there may be more to the victim than anyone knows.
| Actor | Role |
|---|---|
 Stanley BakerDetective Inspector Jamieson | Detective Inspector Jamieson |
 Denis LillSgt. Beck | Sgt. Beck |
| DDavid SwiftInsp. Havelock | Insp. Havelock |
 Derek FrancisOctavius Lamb | Octavius Lamb |
 Barbara Leigh-HuntMadeleine | Madeleine |
| SSimon Fisher-TurnerSteven (as Simon Turner) | Steven (as Simon Turner) |
 Peter SallisLloyd | Lloyd |
 Artro MorrisMr. Humber | Mr. Humber |
 Gillian RaineMiss Bennett | Miss Bennett |
 Michael HawkinsBardon | Bardon |
 Ingrid HafnerMary | Mary |
 Bruce BoaProfessor Friedland | Professor Friedland |
 Cyril ShapsMr. Lavender | Mr. Lavender |
 Shelagh WilcocksMrs. Lavender | Mrs. Lavender |
| HHonora BurkeMrs. Bute | Mrs. Bute |
 John ChallisCasson | Casson |
| AAnthony RoyeDoctor Robson | Doctor Robson |
| EEve KarpfMiss Compton | Miss Compton |
| AAnthony BaileySgt. Latimer | Sgt. Latimer |
 Miles AndersonP.C. Hanworth | P.C. Hanworth |
 Dennis BlanchP.C. York | P.C. York |
 Cheryl HallAmy | Amy |
| CColin EdwynnMichael | Michael |
 Mona HammondNurse | Nurse |
| MMelinda SheridanReceptionist | Receptionist |