Howard Keel as Bill Masen

Janina Faye as Susan - Child on the Train

Nicole Maurey as Christine Durrant

Janette Scott as Karen Goodwin

Kieron Moore as Tom Goodwin

Mervyn Johns as Mr. Coker

Ewan Roberts as Dr. Soames

Alison Leggatt as Miss Coker

Geoffrey Matthews as Luis de la Vega

Gilgi Hauser as Teresa de la Vega

John Tate as Captain - SS Midland

Carole Ann Ford as Bettina

Arthur Gross as Flight 356 Radioman

Colette Wilde as Nurse Jamieson

Ian Wilson as Greenhouse Watchman

Victor Brooks as Poiret

Chris Adcock as Train Passenger (uncredited)

Michael Bishop as Flight 356 Pilot (uncredited)

Ernest Blyth as SS Midland Passenger (uncredited)

Jim Brady as Escaped Prisoner (uncredited)

Jimmy Charters as Blind Man at Station (uncredited)

Maxwell Craig as Escaped Prisoner (uncredited)

Mick Dillon as Triffid (uncredited)

Katya Douglas as Mary (uncredited)

Peter Dyneley as Narrator / Parisian Radio Operator (voice) (uncredited)

Mabel Etherington as Blind Woman (uncredited)

Thomas Gallagher as Burly Man (uncredited)

Muriel Greenslade as SS Midland Passenger (uncredited)

George Hilsdon as Man in Train Station (uncredited)

Gerry Judge as Train Passenger (uncredited)

Frederick Kelsey as Train Crash Survivor (uncredited)

Juba Kennerley as Airline Passenger (uncredited)

Edith Pavitt as SS Midland Passenger (uncredited)

Harry Phipps as Man in Train Station (uncredited)

Bill Rayment as Train Crash Survivor (uncredited)

Ernie Rice as Train Crash Survivor (uncredited)

Johnny Rossi as Escaped Prisoner (uncredited)

John Simpson as Blind Man (uncredited)

Esme Smythe as Panicky Blonde on Flight 356 (uncredited)

Sidney Vivian as Ticket Agent (uncredited)

Joe Wadham as Train Passenger (uncredited)

Fred Wood as Train Passenger (uncredited)