The Agitator is a 1945 British drama film directed by John Harlow and starring William Hartnell, Mary Morris and John Laurie. Its plot follows a young mechanic who unexpectedly inherits the large firm where he works and tries to run it according to his socialist political beliefs. It was based on the 1925 novel Peter Pettinger by William Riley.

The Agitator (1945)
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William Hartnell
Peter Pettinger (as Billy Hartnell)

Mary Morris
Lettie Shackleton

John Laurie
Tom Tetley

Moore Marriott
Ben Duckett

George Carney
Bill Shackleton

Elliott Mason
Mrs. Pettinger

J.H. Roberts
Mr. Ambler

Frederick Leister
Mark Overend

Joss Ambler
Charles Sheridan - the manager of Overend Works