Set in Victorian London, the brilliant Dr. Henry Jekyll (Spencer Tracy) becomes obsessed with the idea of separating man’s good and evil impulses. Frustrated by the social constraints of his engagement to the virtuous Beatrix Emery (Lana Turner), Jekyll creates a serum that transforms him into the sadistic Mr. Hyde.

Franz Waxman’s score earned an Academy Award nomination for its ability to heighten the tension between Jekyll’s refinement and Hyde’s savagery. Legacy and Influence

Tracy’s performance was controversial at the time; some critics felt he was miscast. However, modern retrospectives praise his ability to convey Hyde’s menace through sheer psychological intensity rather than just prosthetics.

The 1941 version is famous for its departure from the 1931 Fredric March version. While March’s Hyde was a simian, prehistoric beast, Spencer Tracy’s Hyde was designed to be much more human. The makeup was understated, relying on Tracy’s facial contortions and a slightly heavy brow to suggest that the monster was not an external creature, but an amplified version of Jekyll’s own repressed desires.

While it initially lived in the shadow of the 1931 version, the 1941 film is now celebrated as a high-water mark for MGM’s "prestige horror." It moved the genre away from simple "creature features" and toward the psychological thrillers that would dominate the 1950s and 60s.