| Terence Alexander | Radio Show Official (uncredited) |
| Jean Alsop | Ice Show Girl (uncredited) |
| Elinor Bennett | Ice Show Girl (uncredited) |
| Paul Beradi | 'Your Birthday Wish' Audience (uncredited) |
| John Boxer | Police Sergeant at Uralian Legation (uncredited) |
| Ronnie Brody | Shop Assistant (uncredited) |
| Tony Castleton | Man Backstage at Ice Show (uncredited) |
| Jess Conrad | Radio Show Attendee (uncredited) |
| Arthur Dibbs | 'Your Birthday Wish' Audience / Radio Show Attendee (uncredited) |
| Richard Duke | Fingerprint Man at Uralian Legation (uncredited) |
| Mabel Etherington | Radio Show Attendee (uncredited) |
| Chick Fowles | 'Your Birthday Wish' Audience (uncredited) |
| Rex Garner | 'Your Birthday Wish' Audience (uncredited) |
| Harold Goodwin | Pringle (uncredited) |
| Lucy Griffiths | Ice Show Singer (uncredited) |
| Pat Hagan | Man Outside Gun Shop (uncredited) |
| Victor Hagan | 'Your Birthday Wish' Audience (uncredited) |
| Patrick Halpin | Detective at Uralian Legation (uncredited) |
| Irene Handl | Customer (uncredited) |
| Jack Hetherington | Radio Show Attendee (uncredited) |
| Vincent Holman | Stage-Door Keeper (uncredited) |
| Lindsay Hooper | TV Technician at Radio Show (uncredited) |
| Glyn Houston | Arresting Policeman (uncredited) |
| Arthur Howell | Police Constable in Gun Shop (uncredited) |
| Kim Kimber | Ice Show Girl (uncredited) |
| Anthony Lang | 'Your Birthday Wish' Audience (uncredited) |
| Guy Longpre | Ice Show Singer (uncredited) |
| Arthur Lowe | Shop Demonstrator (uncredited) |
| Fred Machon | Police Dispatcher (uncredited) |
| Louis Matto | Waiter at Royal Scientific Society (uncredited) |
| Robert McDermott | Man (uncredited) |
| Colin McKenzie | Radio Show Guard (uncredited) |
| Lola Morice | Radio Show Attendee (uncredited) |
| Jim Morris | Ice Rink Sweeper / Radio Show Guard (uncredited) |
| Fred Nicholas | Police Constable in Gun Shop (uncredited) |
| Paul Phillips | Man Watching Tank Demonstration (uncredited) |
| Derek Prentice | TV Reporter at Radio Show (uncredited) |
| Keith Pyott | Mr. Ponting (uncredited) |
| Charles Rayford | 'Your Birthday Wish' Audience (uncredited) |
| Ernie Rice | Man Watching Tank Demonstration (uncredited) |
| Arthur Rigby | Police Station Sergeant (uncredited) |
| Doris Rogers | Mrs. Ponting (uncredited) |
| Pat Ryan | Radio Show Attendee (uncredited) |
| Charles Saynor | Police Sergeant Outside Gun Shop (uncredited) |
| Ian Selby | Fight Bystander (uncredited) |
| Cyril Smith | Refrigeration Plant Worker (uncredited) |
| Ewen Solon | Police Radio Announcer (uncredited) |
| George Spence | Ice Rink Sweeper (uncredited) |
| Guy Standeven | Policeman (uncredited) |
| Philip Stewart | Audience Member (uncredited) |
| Fred Stroud | Fight Bystander (uncredited) |
| Richard Thorp | Police Officer in Patrol Car (uncredited) |
| Rita Tobin-Weske | 'Your Birthday Wish' Audience (uncredited) |
| James Ure | Guest at Royal Scientific Society (uncredited) |
| Harry Van Engel | Man in Office Hallway (uncredited) |
| Meadows White | Ice Show Stage Manager (uncredited) |
| John Wilder | 'Your Birthday Wish' Audience (uncredited) |
| Billy Wilmot | 'Your Birthday Wish' Audience (uncredited) |
| George Wilson | One Man Band (uncredited) |
| Charles Wood | Scientist (uncredited) |
| Doris Yorke | Irritated Café Customer (uncredited) |
