When Teal Ames's character was killed in a 1961 episode, CBS received so many calls after the episode's broadcast that Ames and John Larkin had to appear at the end of the next day's program to reassure viewers that only Ames' character, not the actress herself had died.
When he was on the show, Stephen Markle portrayed Ted Loomis, a corrupt cop who eventually became a serial murderer. Loomis killed several other characters, and the fans loved him and wanted him to keep killing even more characters. The producers became alarmed that his evil, psychopathic character was becoming too popular. As a result, it was decided to write out Loomis by killing the character. Fans were shocked and outraged by this decision.
When Procter and Gamble moved the series to ABC from CBS, the latter prevented P&G from mentioning which network the show would be moving to. Thus, ads promoting the show's move said it would now be airing on "another network".
Created by Irving Vendig, who had been writing the weekday radio drama Perry Mason for CBS and Proctor and Gamble. The program was originally intended to be a TV version of that radio drama, but the rights were denied by Perry Mason's creator, Erle Stanley Gardner, because the producers did not promise that the characters of Perry Mason and Della Street would remain romantically uninvolved.