Gaslight (1940 film)

Gaslight is a 1940 British film directed by Thorold Dickinson which
stars Anton Walbrook and Diana Wynyard, and features Frank Pettingell.
The film adheres more closely to the original play upon which it is
based – Patrick Hamilton's Gas Light (1938) – than the better-known 1944
MGM adaptation. The play had been shown on Broadway as Angel Street, so
when the film was released in the United States it was given the same
name.