
U.S. Embassy employee Lee Cochrane and his wife, Sue, receive a shock when they discover that their 18-month-old son, Simon, has disappeared in London. He was last seen with their nanny, and the couple seemingly have no leads that might help police Detective Craig in his investigation. The media sensationalizes the incident, causing an unnecessary distraction as the couple prepares to confront the culprit face-to-face.
Detective Inspector Craig

Lee Cochrane

Sue Cochrane

Sergeant Lyel
Kelly's landlady

Sergeant Cook

Nanny
Mrs. Jeffries

Mrs. Robey
Viscountess Cardale

Sergeant Davies

Mitzi

Miss Gill

Pam

Sue's Secretary

Henrietta Gay
Girl Working at Taxi Garage

Chemist

Ice Cream Seller in the Park

Librarian

Young Girl in Chemist

Zoe's Mother

Farmer with Shotgun

Nanny in the Park (Uncredited)
Uniformed Police Officer

Shopkeeper
Erikkson (Uncredited)

Mrs. Robey's Neighbour (Uncredited)
Ice Cream Girl's Friend

Gamble (Uncredited)

Police Constable in Phone Box

Bus Driver

Police Station Sergeant (Uncredited)

Railway Workman (Uncredited)
Press Photographer (Uncredited)

Hotel Porter (Uncredited)

Farmer's Wife (Uncredited)

Dr. Fairfax (Uncredited)

Mrs. Gamble

Urchin (Uncredited)
Bus Inspector (Uncredited)

Mrs. Marley

Mrs. Bellamy (Uncredited)

Mantilla

Military Man (Uncredited)

Police Scientist (Uncredited)

Sergeant Thorne (Uncredited)
Taxi Driver

Police Sergeant (Uncredited)
Park Keeper (Uncredited)
Young Girl in Chemist
Young Police Scientist

Nanny (Uncredited)
Police Driver (Uncredited)
Constable with Books (Uncredited)
Police Constable (Uncredited)
Urchin (Uncredited)
Mrs. Martin (Uncredited)
Man in Street (Uncredited)