Perry Mason/The Case of the Lethal Lesson
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Special Guest Star: Brian Keith (Frank Wellman, Sr.)
Guest Stars: Leslie Ackerman (Donna Lehman), Richard Allen (Jeff Thomas), Brian Backer (Eugene), John De Mita (Scott McDonald), Karen Kopins (Kimberly McDonald), John La Motta (Al), Charley Lang (Travis Howe), John Allen Nelson (Frank Wellman, Jr.), Mark Rolston (Vic Hatton), Raye Birk (Sam Morgan), Marlene Warfield (Marilyn Anson)
Defending a law student accused of murdering an arrogant classmate, Perry's troubled by the fact that the dead man's father is a longtime friend and law school classmate of his.
Starting with this film, William R. Moses (as Ken Malansky) takes over for William Katt as Perry's new legman. Alexandra Paul plays a love interest for Ken and a fellow investigator for Perry for the next couple of movies.