US embassy employee Lee Cochrane and his wife discover their 18-month-old son Simon has been abducted, when their nanny leaves the child unattended outside a chemist's shop. London Detective Inspector Craig pledges to find the child, though clues are thin on the ground.
David Farrar as Detective Inspector Craig
David Knight as Lee Cochrane
Julia Arnall as Sue Cochrane
Anthony Oliver as Sergeant Lyel
Thora Hird as Kelly's landlady
Eleanor Summerfield as Sergeant Cook
Anne Paige as Nanny
Marjorie Rhodes as Mrs. Jeffries
Anna Turner as Mrs. Robey
Everley Gregg as Viscountess
Meredith Edwards as Sergeant Davies
Anita Sharp-Bolster as Miss Gill (billed as Anita Bolster)
Beverly Brooks as Pam (telephone operator) - uncredited
Allmovie wrote, "This nail-biting film is filled to capacity with many of Britain's top supporting players, including Thora Hird, Everley Gregg, Joan Sims, Shirley Anne Field, Joan Hickson, Dandy Nichols, Mona Washbourne, Barbara Windsor and George Woodbridge"; and the Radio Times wrote, "this film succeeds because it confronts every parent's nightmare: what happens when you suddenly look away and find your child is missing when you look back? Of course, this being a class-riddled Rank picture, it's the nanny who loses the baby, but it's pretty harrowing nonetheless, despite the casting of insipid David Knight and Julia Arnall as baby Simon's parents. Granite-faced cop David Farrar is on hand to bring grit to screenwriter Janet Green's earnest chase movie, and not-so-hidden among the red herrings are a welter of British character players, with particularly impressive work from Thora Hird. The little-known Anna Turner also gives a fine performance as the tormented baby-snatcher, and Harry Waxman's colour location photography is superb, but the cliff-top climax is a little hard to believe."
Benjamin frankel music from lost aka tears for simon 1956