Named for this movie, “gaslighting” has become a recognized form of controlling and manipulative behavior. It involves an exploitative person manipulating those who suspect him/her into doubting themselves and questioning their own perceptions, so that they distrust their own suspicions of the manipulator. This behavior is now classified as a form of psychological abuse.
 The first scene establishes the dreary tone of the film. It is nighttime in London and a murder goes unsolved.
 Charles Boyer has in this film a thankless role, that of a devouring immoralist who has only two possible moods– brief burst of anger needing to be controlled and an exuded charm that must be slightly overdone at times.
 The actress – who would soon become blacklisted after her marriage to Italian director Roberto Rossellini – can convey every emotion and nuance of her character through her amazingly expressive eyes.
-Excerpts from IMDB reviews
The original Broadway stage play and source for the screenplay was Angel Street by Patrick Hamilton, which opened at the John Golden Theater on December 5, 1941 and ran for over a 1,200 performances! The original stage cast included Leo G. Carroll, Vincent Price, and Judith Evelyn. After the death of her famous opera singer aunt/guardian, Paula Alquist (Ingrid Bergman), goes to study in Italy to see if she has any talent as a singer as well. She falls in love w/ a charming/older man who works as a composer, Gregory Anton (Charles Boyer), and they return to London and take up residence in her aunt’s townhouse. Gregory limits her having visitors and going out. He keeps saying that his wife is unwell to anyone who asks. She begins to notice strange goings-on: missing pictures, strange footsteps at night, and gaslights dimming. Paula feels like she may be going out of her mind!
Bergman (who won an Oscar for her role) spent some time in a mental institution to research her role, studying a woman who had suffered a nervous breakdown. This was a suggestion from Cukor, who is known for his ability to draw out fine performances (esp. from women). As my mom commented, this was rare type of role for Bergman. I learned that the actress was initially reluctant to take on this role, as she considered herself to be very strong/independent. She worried that she’d be unable to convincingly play a timid/fragile woman.
Dame Angela Lansbury was only 17 y.o. when she made this- her movie debut! Lansbury (who was nominated for an Oscar) had never acted before her screen test, but she impressed director George Cukor w/ her natural talent. The scene in which the sassy/flirty maid Nancy lights a cigarette, defying her mistress Paula, had to be postponed until near the end of production. The social worker who was monitoring Lansbury refused to allow her to smoke (while she was a minor). New scenes not in the original play were added to this version. Brian Cameron (Joseph Cotten) was changed from a stout, sardonic elderly man to a young, handsome one (as a potential love interest for Bergman). For his part, Cotten relished the chance to play a heroic role, as he had done shady/negative roles in the few years before.
Cukor asked producers (who were reluctant) to hire Paul Huldschinsky to design the Victorian sets. Huldschinsky was a German refugee who fled his native country because of WWII. He knew much re: upper-class European decor, b/c his family had grown wealthy through their newspaper business and his wife was the heiress of a railroad fortune. When he moved to the U.S. most of that money was gone and he got by working on smaller pictures. However, his luck changed w/ this picture, and Huldschinsky won an Oscar for set design.