Watch Perry Mason Season 5 Episode 20: The Case of the Poison Pen-Pal Online

	IMDB Rating: 7.9/10 from votes
	Release: 1962 / Perry Mason / Season 5 / Episode 20
	Genre: Crime \| Drama \| Mystery
	Director: Arthur Marks
	Stars: Raymond Burr, Barbara Hale, William Hopper
	Synopsis: Just as they are about to merge with another company, Gregson Canneries sees its stock unexpectedly go up in price. This is bad news for the company and principal owner Wilma Gregson who tells president Peter Gregson to immediately go to Chicago and renegotiate the merger. Their company is nearly bankrupt and the rising price won't help. Wilma is convinced that someone leaked news of the merger and suspects Peter's former secretary Karen Ross who he was forced to fire due to leaked plans she put in a company car - supposedly on the orders of his alcoholic wife - in which the wife was killed. Also, Karen was involved heavily with Peter at the time. Peter is now a single parent and lives alone with his young daughter Sandra. When he learns that Sandra has leaked the merger information in letters to her pen pal, Paul Drake is brought in to investigate. Perry Mason is drawn into the case when Wilma Gregson is killed and Karen Ross is charged with her murder.