Episode credited cast: |
 | Tommy Cannon | - | Himself |
 | Bobby Ball | - | Himself |
 | Eric Sykes | - | Himself / Poirot |
 | Jill Gascoine | - | Ilsa |
 | Mari Wilson | - | Herself - Musical Guest (as Mari Wilson with The Wilsations) |
 | Renee & Renato | - | Themselves - Musical Guests |
 | Maggie Henderson | - | Mademoiselle |
 | John Dixon | - | Murder Victim |
Rest of cast listed alphabetically: |
 | Val Guest | - | Himself - The Boys in Blue VT (archive footage) |
 | Hilary Lester | - | Herself - Renee & Renato (as Renee & Renato) |
 | Renato Pagliari | - | Himself - Renee & Renato (as Renee & Renato) |