Perry Mason (1957–1966)
5 user

The Case of the Stand-In Sister 

John Gregory is caught in a trap when his mobster brother escapes and wants the money he put in a trust fund for his daughter. At the same time the manager of the trust fund tries to blackmail Gregory about it and is murdered.


Allen H. Miner


Erle Stanley Gardner (based upon characters created by), Robert Leslie Bellem


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Episode cast overview, first billed only:
Raymond Burr ... Perry Mason
Barbara Hale ... Della Street
William Hopper ... Paul Drake
William Talman ... Hamilton Burger
Ray Collins ... Police Lt. Arthur Tragg (credit only)
Wesley Lau ... Police Lt. Andy Anderson
R.G. Armstrong ... John Gregory
Peter Whitney ... Stefan 'Big Steve' Jahnchek
Peter Mamakos ... Nick Paolo
Parley Baer ... David Bickel
Susan Seaforth Hayes ... Helen Gregory (as Susan Seaforth)
Steven Geray ... Franz Moray
Meg Wyllie ... Margaret Stone
Walter Stocker Walter Stocker ... Van Bennett
Ralph Clanton Ralph Clanton ... Karl Corby


When mobster Stefan 'Big Steve' Jahnchek escapes from custody during a Congressional hearing, he heads straight to Los Angeles and commercial fisherman John Gregory. He wants false papers, transportation to Mexico, and money from Gregory. Before going into prison nearly 20 years before, Big Steve had entrusted his newborn daughter Helen and a large sum of money to his brother Gregory for safekeeping. Now he wants both of them back as the daughter must sign for the money which is his real interest. Gregory had adopted the daughter as Jahnchek has never seen her plus she is now engaged to a senator. Gregory also finds himself being blackmailed by Franz Moray, a retired Swiss bank official. Gregory has bad news for Big Steve about his daughter and his own money is in escrow pending the completion of a business deal. When Moray is found dead, Gregory is charged with murder and Perry Mason defends him. Written by garykmcd

Plot Summary | Add Synopsis


Crime | Drama | Mystery


Did You Know?


Helen Gregory refers to her father John as "hunyak." The term is spelled in a variety of ways and translated differently depending on the language of origin. The most common understanding is a "big lug" or unsophisticated immigrant. See more »

User Reviews

Who's daughter is it?
29 December 2012 | by bkoganbingSee all my reviews

This episode was way overplotted with complex motives and the ordinary viewer might get a bit lost here. Peter Whitney who is a notorious gangster from Boston after appearing at a Senate Crime Committee hearing, bolted and headed west to see his brother R.G. Armstrong. Years before Armstrong left the Boston area and changed his name, but before that Armstrong set up a trust fund for Whitney's daughter. Now Whitney wants to break the trust and use that as both getaway and living money in some no extradition country.

Seems as though the money is in question as the child may have been killed in an accident long ago with Armstrong's wife and daughter. But was it Whitney's daughter? Whoever it is she grew up to be Susan Seaforth.

It's a blackmailing Swiss banker Steven Geray who is the victim, but who did it? Armstrong didn't because he has Perry Mason representing him.

The story has the real murderer coming in from the bleachers. Not the best Mason story.

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Release Date:

15 November 1962 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:

Mono (Westrex Recording System)

Aspect Ratio:

1.33 : 1
See full technical specs »

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