A routine mission ends up in a flaming inferno when a house suddenly explodes. It looks like a spectacular suicide attempt but the technical investigation reveals unexpected evidence. Beck and his men are soon on the tracks of a narcotic syndicate...
| Actor | Role |
|---|---|
 Gösta EkmanMartin Beck | Martin Beck |
 Kjell BergqvistLennart Kollberg | Lennart Kollberg |
 Rolf LassgårdGunvald Larsson | Gunvald Larsson |
 Niklas HjulströmBenny Skacke | Benny Skacke |
 Daniela ZieglerNadja Kovacs | Nadja Kovacs |
| HHolger KunkelStoiweiler | Stoiweiler |
 Maria HeiskanenCarla | Carla |
| BBernt StrömEinar Rönn | Einar Rönn |
 Torgny AnderbergEvald Hammar | Evald Hammar |
 Agneta EkmannerGreta Hjelm | Greta Hjelm |
 Tova MagnussonPutte Beck | Putte Beck |
 Ing-Marie CarlssonGun Kollberg | Gun Kollberg |
 Gunvor PonténMrs Olofsson | Mrs Olofsson |
| UUlla AkselsonStoiweiler's neighbour | Stoiweiler's neighbour |
 Anita EkströmInga Beck | Inga Beck |
| RRolf JennerMax Karlsson | Max Karlsson |
 Peter SchrøderMogensen | Mogensen |
| BBirger ÖsterbergKvant | Kvant |
 P.G. HylénKristiansson | Kristiansson |
| LLena LindblomWard nurse | Ward nurse |
| TThomas WrisemoGuardian 1 | Guardian 1 |
| RRon SanfordBlack man | Black man |
 Maj SjöwallWoman next to Martin Beck on the flight (uncredited) | Woman next to Martin Beck on the flight (uncredited) |