is Theodore Roosevelt, resides with them. Each time Teddy goes upstairs, he yells "Charge!" and runs up the stairs, imitating Roosevelt's famous 1898 charge up San Juan Hill. Searching for the notes for his next book, Mortimer finds a corpse hidden in the window seat. He assumes in horror that Teddy's delusions have led him to murder. Abby and Martha cheerfully explain that they are responsible, that as serial murderers, they minister to lonely old bachelors by ending their "suffering". They post a "Room for Rent" sign to attract a victim, then serve a glass of elderberry wine spiked with arsenic, strychnine, and cyanide while getting acquainted with them. The bodies are buried in the basement by Teddy, who believes they are yellow fever victims who perished in the building of the Panama Canal. While Mortimer digests this information, his brother Jonathan arrives with his alcoholic accomplice, plastic surgeon Dr. Herman Einstein. Jonathan is also a serial murderer trying to escape from the police and dispose of his latest victim, Mr. Spinalzo. Jonathan's face, altered by Einstein while drunk, resembles Boris Karloff's Frankenstein monster makeup. Jonathan learns his aunts' secret and proposes to bury his victim in the cellar. Abby and Martha object vehemently because their victims were "nice" gentlemen while Jonathan's victim is a stranger and a "foreigner". Jonathan also declares his intention to kill Mortimer. Elaine is impatient to leave on their honeymoon but is concerned about Mortimer's increasingly odd behavior as he frantically attempts to control the situation. He tries unsuccessfully to alert the bumbling police to Jonathan's presence. To draw attention away from his aunts and deprive them of their willing but uncomprehending accomplice, Mortimer tries to file paperwork to have Teddy legally committed to a mental asylum. Worrying that the genetic predisposition for mental illness resides within him, Mortimer explains to Elaine that he can't remain married to her. Eventually Jonathan is arrested, Einstein flees after signing Teddy's commitment papers, Teddy is safely consigned to an institution, and his aunts insist upon joining him. Upon hearing that Mortimer signed the commitment papers as next of kin, Abby and Martha are concerned they may be null and void; they inform Mortimer that he is not a Brewster after all: his mother was the family cook and his father was a chef on a steamship. Relieved, he lustily kisses Elaine and whisks her off to their honeymoon.