Perry Mason

The Case of the Borrowed Brunette (2x13)

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Eva Martell is hired out of numerous candidates by Melvin Slater to impersonate a woman named Helen Reynolds. Eva is paid extremely well and given a nice apartment to live in with her Aunt Agnes as long as she continues with her impersonation. Both Eva and her aunt suspect a rat and seek Perry's advice. Then Melvin Slater turns up dead in the apartment.