Episode 6, "The Adventure of Miss Aggie's Farewell Performance," showcases Eve Arden (OUR MISS BROOKS) as actress Vera Bethune, best known for the role of Miss Aggie, leading character in a radio soap beloved by millions of listeners, who is making exorbitant salary demands that the sponsors are unwilling to meet. During the current broadcast, Vera collapses in the studio and is rushed to the hospital, a victim of poison. Within the hour she begins receiving the press, as well as the probing questions of Ellery and his father (whom she refers to as that 'funny little inspector'). Some time after midnight, an unseen assailant sneaks into Vera's room and shoots the defenseless actress dead, but not before the victim awakens and recognizes her killer. Both Queens blame themselves for the murder, even though the actress refused police protection, as well as the hospital. Everyone that was in the studio when Vera was poisoned falls under suspicion: fellow actor Lawrence Denver (Bert Parks), actress Anita Leslie (Penelope Windust), the newcomer being groomed to replace the temperamental star, announcer Wendell Warren (Paul Shenar), and organist Mary Lou Gumm (Beatrice Colen), who had a crush on Warren until he started dating Vera instead. Listening in the booth during the broadcast were Mr. Pearl (John McGiver), representative of the Vita-Cream sponsors, and Simon Brimmer (John Hillerman), unsuccessfully trying to make a new pitch for his own radio show, "The Casebook of Simon Brimmer." As usual, the overeager Brimmer fingers the wrong party during a special live broadcast intended to demonstrate to Mr. Pearl what a dependable sleuth he purports to be. Betty White, then still co-starring on THE MARY TYLER MOORE SHOW, appears as Louise Demery, Vera's agent, who meets Ellery at the hospital, dismissing his profession with the words, "I thought you said he was an author!" Nan Martin and Gerald Hiken play the show's writers, planning to kill off Miss Aggie if she failed to cooperate with the powers-that-be. Nina Roman makes a brief return as Grace, Inspector Queen's secretary, while this would be the final performance of delightful veteran John McGiver, who died on Sept. 9 1975, one month before this episode was broadcast on Oct. 16.
