LOCATION: London, England DATE: June 20th Four men dressed in various costumes are gunned down in a cellar. The gun of one had been fired, the bullet turning up in the body of a man found in the trunk of a submerged car. Stewart pays a call on a crime broker to see who hired the men and how the crimes relate to a house in St. John's Woods, where a woman is being kept sedated because she thought she saw four men wearing disguises committing a robbery in the house.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| John Gilling | Director | ||
| Joel Fabiani | Actor | Stewart Sullivan | |
| Robin Hawdon | Actor | Walter Pally | |
| Rosemary Nicols | Actor | Annabelle Hurst | |
| Brandon Brady | Actor | Tronson | |
| Dennis Alaba Peters | Actor | Curtis Seretse | |
| Edward Brayshaw | Actor | Vic Kent | |
| Paul Whitsun-Jones | Actor | Martin Kyle | |
| Brian Oulton | Actor | Doctor Davis | |
| Peter Wyngarde | Actor | Jason King | |
| Denise Buckley | Actor | Libby Spear | |
| Frank Forsyth | Actor | Norman Fowler |