Ronald Coleman seemed to gravitate toward roles involving either multiple characters or one character with a divided personality—and he delivers exceptionally well on that front in this film. Having some familiarity with Shakespeare's "Othello" proves beneficial, as he embodies an actor named “Tony” who, after many years of portraying the titular role alongside his former spouse "Brita" (Signe Hasso)—who also plays “Desdemona” in the play—finds himself increasingly uncertain about which reality is genuine. His emotional state isn't improved when he encounters Shelley Winters’ character, "Pat," in a bar; they begin a relationship that doesn't fulfill his deepest desires, which are to find contentment with "Trina." When he proposes remarriage to her, she refuses, plunging him into a depressive episode that leads to tragic outcomes as he further immerses himself in his persona—only this time, “Pat” becomes the victim. Coleman brings an undeniable intensity to the role; his gaze is unsettling, and his nearly schizophrenic portrayal can be genuinely frightening at times. His Shakespearean performance on stage is respectable, though not quite reaching Olivier’s standard when it's needed. This, combined with notable performances from Hasso and his friend "Bill" (Edmond O'Brien), who gets dangerously close to shouldering the responsibility for the worst of Coleman’s behavior, creates a captivating, skillfully filmed narrative about a split personality that descends into madness. George Cukor maintains a taut and concentrated feel throughout, while Miklós Ròsza once more provides a score that significantly enhances the film's atmosphere.

Source on TMDB