The Devil’s Disciple (1959)

In a small New England town during the American War of Independence, Dick Dudgeon, a revolutionary American Puritan, is mistaken for local minister Rev. Anthony Anderson and arrested by the British. Dick discovers himself incapable of accusing another human to suffer and continues to masquerade as the reverend.
Guy Hamilton
Burt Lancaster, Kirk Douglas, Laurence Olivier, Janette Scott, Eva Le Gallienne, Harry Andrews, Basil Sydney, George Rose, Neil McCallum, Mervyn Johns, David Horne, Erik Chitty, Allan Cuthbertson, Percy Herbert, Phyllis Morris, Brian Oulton, Steven Berkoff
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