LOCATION: City of Southwark Hospital, London DATE: October 24th A British government official suffers a brain hemorrhage. While in surgery, his surgeon is replaced by another man. Instead of killing the official, the substitute doctor completed the operation. The Department must find out why, while Jason disputes the official government records that state the official has never been to Istanbul.
| Name | Type | Role | |
|---|---|---|---|
| Leslie Darbon | Writer | ||
| Cyril Luckham | Guest Star | Walker | |
| Ronald Radd | Guest Star | Allison | |
| Jean Marsh | Guest Star | Agatha Pollen | |
| Cyril Frankel | Director | ||
| Victor Baring | Actor | The Waiter | |
| Ronald Leigh-Hunt | Actor | Haslet-Wood | |
| Johnny Briggs | Actor | 2nd Reporter | |
| Basil Dignam | Actor | Smith | |
| Francisca Tu | Actor | Turkish Nurse | |
| Peter Wyngarde | Actor | Jason King | |
| Nik Zaran | Actor | Turkish Imspector | |
| Martin Miller | Actor | Dutrov | |
| Philip Locke | Actor | Topek | |
| Joel Fabiani | Actor | Stewart Sullivan | |
| Sue Gerrard | Actor | English Nurse | |
| Marne Maitland | Actor | Turkish Caretaker | |
| George Roubicek | Actor | Balik | |
| Rosemary Nicols | Actor | Annabelle Hurst | |
| Sultana | Actor | Belly Dancer | |
| Harold Kasket | Actor | Korlandt | |
| Tony Thawnton | Actor | 1st Reporter | |
| Dennis Alaba Peters | Actor | Curtis Seretse |