Bernice Roth arrive and meet the performers, and the group gets started with their work. After things get underway, Marjorie is murdered and the body of Helsa is discovered. After a series of dizzy conversations, multiple trips through secret doorways leading to a labyrinth of hidden passageways, a power outage in the mansion, multiple crimes, and criminals are revealed. Eventually after much murderous mayhem the Stage Door Slasher is revealed and captured through deciphering Bebe's coded notebook. It is revealed to be Ken the weird director. Main characters Helsa Wenzel Helsa is the maid of the Grossenknueten estate. She is killed in the first scene of the play, only to be impersonated by her homicidal twin brother, Dieter. The actress who plays Helsa also appears at the end of the play as "Katrina, the cook from Koblenz." Elsa Von Grossenknueten Elsa is the eccentric owner of the mansion and is the financial backer of many musicals. Elsa summons the group together in an attempt to find out who murdered her "friend" Bebe McAllister. She is extremely eccentric, and thinks that the idea of chasing after a killer is great fun. Her grandfather was a spy, and she claims that espionage runs in her blood. Michael Kelly Kelly is an undercover cop. Elsa appeals to him to help solve the mystery of the Stage Door Slasher, and Kelly at first pretends to be her butler. Kelly's tough, no-nonsense attitude puts him at odds with Elsa and the dramatic types that visit. He eventually reveals his identity as a New York police officer, much to Elsa's dismay. In the second act, he is kidnapped by an unseen figure and disappears into a secret passage, and is later found with his hands tied a gag in his mouth. Willie C. Carpenter was the first to play him. Patrick O'Reilly O'Reilly claims to be an Irish tenor, but he is very suspicious, especially with regard to the mysterious Helsa. The two engage in a physical brawl. Eventually, O'Reilly claims to be "Tony Garibaldi", an undercover cop with a Bronx accent-only to reveal himself as a Gestapo Agent named Klaus Stansdorff, sent to find German defectors. Nikki confronts him, but before he can reveal the truth, Helsa stabs him through a copy of Moby-Dick in the second act, killing him. The original O'Reilly was played by Nicholas Wyman. Ken De La Maize First played by