A bomb-throwing incident in 1905 sets off a train of events which ends in a murder and a suicide.
| Actor | Role |
|---|---|
 Paul RogersMr. Verloc | Mr. Verloc |
| FFrances WhiteWinnie Verloc | Winnie Verloc |
 Robert HardyThe Assistant Commissioner | The Assistant Commissioner |
 Anton RodgersMr. Vladimir | Mr. Vladimir |
 Joyce CareyLady Dorothy | Lady Dorothy |
 Peter SallisChief Inspector Heat | Chief Inspector Heat |
 Michael GambonTom Ossipon | Tom Ossipon |
 John CaterThe Professor | The Professor |
 Vernon DobtcheffKarl Yundt | Karl Yundt |
 Bruce PurchaseMr. Michaelis | Mr. Michaelis |
| VVivienne BurgessWinnie's Mother | Winnie's Mother |
| PPeter CloughStevie | Stevie |
 Ann QueensberryGuest | Guest |
| AAndree EvansGuest | Guest |
| SSara Van BeersGuest | Guest |