MGM's The Flame Within was the second entry in the "psychiatric" film-cycle inaugurated by Paramount's
Private Worlds.
Ann Harding stars as female psychiatrist Mary White, who likes to think that she is personally above her patients' emotional problems. This proves not to be the case when Mary takes a more than professional interest in the plight of self-destructive alcoholic Jack Kerry (
Louis Hayward). Also involved in this situation is Kerry's troubled fiancee Lillian Belton (
Maureen O'Sullivan), who has twice attempted suicide out of love for the man. Thus, Mary's dilemma is compounded: she has fallen in love with Kerry herself, and where does that leave poor Lillian? A little shaky in terms of psychology, The Flame Within works best on a purely melodramatic level. ~ Hal Erickson, All Movie Guide