| Name | Character | Episodes |
|---|---|---|
| Jason Isaacs | Cary Grant | 4 |
| Harriet Walter | Elsie Leach | 4 |
| Jason Watkins | Stanley Fox | 4 |
| Kara Tointon | Young Elsie | 4 |
| Laura Aikman | Dyan Cannon | 4 |
| Henry Lloyd-Hughes | Young Elias | 3 |
| Calam Lynch | Twenties Archie | 3 |
| Ian McNeice | Alfred Hitchcock | 2 |
| Oaklee Pendergast | Teen Archie | 2 |
| Reece Douglas | Skip | 2 |
| David Nellist | Eric | 2 |
| John Moraitis | Dr. Hartman | 2 |
| Niamh Cusack | Alma Hitchcock | 1 |
| Lisa Faulkner | Dorothy | 1 |
| Ian Puleston-Davies | Pender | 1 |
| Samantha Colley | Barbara Harris | 1 |
| Burt Caesar | Hospital Doctor | 1 |
| Stewart Alexander | Cohen | 1 |
| Lily Travers | Grace Kelly | 1 |
| Bruce Lester-Johnson | Dr. Hansen | 1 |
| Laura Ferries | Virginia Churchill | 1 |
| Shenagh Govan | Grandmother | 1 |