 | Barbara Shelley als Leonora Johnson / Leonora Brandt |
 | Robert Ayres als Dr. Brian Marlowe |
 | Kay Callard als Dorothy Marlowe |
 | Ernest Milton als Edmund Brandt |
| Lily Kann als Anna (Brandts' Housekeeper) |
 | Jack May als Richard Johnson |
| Paddy Webster als Cathy |
 | John Lee als Allan |
| Edward Harvey als Doorman |
 | Martin Boddey als Cafferty |
| Selma Vaz Dias als Nurse |
| John H. Watson als Roberts |
| John Baker als Male Nurse (uncredited) |
| Selma Vaz Dias als Nurse (uncredited) |
| Jim Tyson als Barman (uncredited) |
| Frank Atkinson als Guard (uncredited) |
| Geoffrey Tyrrell als Caretaker (uncredited) |
| Lou Rusoff | Producer |
| Lou Rusoff | Writer |
| Alfred Shaughnessy | Director |
| Herbert Smith | Producer |
| Eric Saw | Art Direction |
| Mike Rutter | Clapper Loader |
| Peter Rogers | Executive Producer |
| Olga Brook | Continuity |
| Peter Hennessy | Director of Photography |
| Jack Stevens | Production Design |
| Jocelyn Jackson | Editor |
| John 'Pinky' Green | Production Manager |
| Paddy Aherne | Camera Operator |
| William Hill | Assistant Director |
| Len Page | Sound Recordist |
| Philip Leakey | Makeup Artist |
| Nina Broe | Hairdresser |
| Vi Murray | Wardrobe Master |
| John Addison | Music |
| Kenneth Essex | Music |
| Robert Gill | Music |
| Frank Spencer | Music |
