The Iron Maiden
The film follows Jack Hopkins, an aircraft designer with a passion for traction engines. His boss is eager to sell a new supersonic jet plane that Jack has designed to American millionaire Paul Fisher. The first encounter between Fisher and Jack goes badly, and tensions only heighten after Fisher's daughter Kathy damages Jack's prize traction engine "The Iron Maiden", rendering it impossible to drive solo. Jack is desperate to enter the annual Woburn Abbey steam rally with the machine, but his fireman is injured and unable to participate. When all seems lost the millionaire himself is won over by Jack's plight and joins him in driving the engine; the two soon become firm friends.
Anne Helm
Kathy Fisher
Michael Craig
Jack Hopkins
Jeff Donnell
Miriam Fisher
Alan Hale Jr.
Paul Fisher
Noel Purcell
Admiral Sir Digby Trevelyan
Cecil Parker
Sir Giles Thompson
Roland Culver
Lord Upshott
Joan Sims
Nellie Trotter
John Standing
Humphrey Gore-Brown
Brian Oulton
Vicar
Sam Kydd
Fred Trotter
Judith Furse
Mrs. Webb
Jim Dale
Bill
George Woodbridge
Sid Ludge
Richard Thorp
Harry Markham
Peter Byrne
Race Starter (uncredited)
Ian Wilson
Sidney Webb
Brian Rawlinson
Albert - Village Constable
Douglas Ives
Charlie
David Aylmer
Thompson's Salesman
Peter Burton
Thompson's Salesman
Michael Nightingale
Senior Rally Steward
Raymond Glendenning
Rally Commentator (voice)
Cyril Chamberlain
Mrs. Webb's Teammate
Peter Jesson
'Wrong' Rolls Royce Owner
Anton Rodgers
Concierge
Tom Gill
Rally Steward
Anthony Baird
Bill Cartwright
Middleton Woods
Peter Wells
Actor
Eric Corrie
Jonathan Kydd
Fred's Son
John Russell
Himself
Pat Ryan
Rally Steward (uncredited)