Trailer
 | Bart Allison as Pim |
 | Christopher Benjamin as Algy Somerville |
 | Diane Cilento as Lady Sannox |
| Deddie Davies as Yvonne |
 | Roy Dotrice as Douglas Stone |
| David Graham as Dr. Hamid Ali |
| Malcolm Rogers as John |
| Charles Workman as Lord Sannox |
| Directing | |
| Richard Martin | Director |
Writing | |
| Arthur Conan Doyle | Writer |
| John Hawkesworth | Writer |
