Harpo Marx York accent his entire life. According to those who personally knew him, Harpo's voice was much deeper than Groucho's, but it also sounded very similar to Chico's. His son, Bill, recalled that in private Harpo had a very deep and mature soft-spoken voice, but that he was "not verbose" like the other Marx brothers; Harpo preferred listening and learning from others. Harpo's final public appearance came on January 19, 1963 with singer/comedian Allan Sherman. Sherman burst into tears when Harpo announced his retirement from the entertainment business. Comedian Steve Allen, who was in the audience, remembered that Harpo spoke for
Things Which Have Never Yet Been Done (Skyler Wexler) undergoes bone marrow extraction to donate to Cosima in an attempt to cure Cosima's illness. Alison and her husband Donnie (Kristian Bruun) attempt to bury Dr. Aldous Leekie's body, while Helena attempts to escape from the ranch of the Proletheans, a religious extremist group. "Things Which Have Never Yet Been Done" marked the first on-screen appearance of Kathryn Alexandre, who also works on the show as Maslany's "clone double" when filming scenes where multiple clones interact. The episode was filmed at various locations in Toronto and the title was taken from Francis Bacon's work "Novum Organum". It was