Podcast:CBS Radio Mystery Theater (Restoration) Published On: Fri Oct 10 2025 Description: 0313 - The Poisoned Pen (7/22/1975)Written by Sam Dann. Directed by Himan Brown.Cast: Roberta Maxwell; Catherine Byers; Michael Tolan; Earl Hammond; Richard Seth.The deaths of several people are tied to two things: they each received a mysterious letter, and they shared disdain for a marginally talented actress.