The Case of the Mischievous Doll / Try Anything Once

A mysterious young woman, Dorrie Ambler, wishes to prove her identity to Perry Mason. She wants him to witness her appendectomy scar, claiming she has a double. The double turns out to be Minerva Minden, madcap heiress of Montrose. Mason has his work cut out for him when his investigation leads him to a dead man in an apartment building.