Professor William Delmore is a famous hypnotist who comes to Greenpoint. He gives a demonstration in hypnotism in front of the the building for the Greenpoint Herald to which Alfalfa Switzer and the gang attend. When Alfalfa volunteers himself as a subject to be hypnotized, Delmore convinces him that he's D'Artagnan of The Three Musketeers. Darla Hood ends up loving the new chivalrous and romantic Alfalfa, but Muggsy realizes the hypnotic trance and the resulting duel between Alfalfa and Butch could be dangerous.
Professor Delmore was played by actor John Davidson.