Dr. Jekyll believes good and evil exist in everyone and creates a potion that allows his evil side, Mr. Hyde, to come to the fore. He faces horrible consequences when he lets his dark side run amok.

Spencer Tracyas Dr. Henry 'Harry' Jekyll / Mr. Hyde
Ingrid Bergmanas Ivy Peterson
Lana Turneras Beatrix 'Bea' Emery
Donald Crispas Sir Charles Emery
Ian Hunteras Dr. John Lanyon
Barton MacLaneas Sam Higgins
C. Aubrey Smithas The Bishop
Peter Godfreyas Poole
Sara Allgoodas Mrs. Higgins
Frederick Worlockas Dr. Heath
Joseph Ruttenberg