Dead Ringer (1963)7.3 /10

Storyline:  After the death of her brother-in-law, Edith Phillips discovers that her twin sister Margaret de Lorca deceived her to marry the man she loved. Driven by resentment, she murders Margaret and takes over her life. But her deception falters when Margaret’s lover, Tony Collins, and Sgt. Jim Hobbson, a detective who once cared for Edith, begin to close in.