Everyone dances at Arnold's to "Hound Dog" including Joanie and a young kid. Potsie makes a sarcastic remark, and Joanie tells him to sit on it. Ralph plays some pinball before Frankie and Rocko come in and push him out of the way. Richie and his date, Stephanie Honker, come in with a picnic basket. The two hoodlums made Richie move out of his parking place at Arnold's - embarrassing him in front of his date. The also crushed his Thermos. The bells on the pinball machine don't work, and Mr. Parking Lot (Richie) is forced to imitate pinball-machine noises while they play a game. Fonzie comes into Arnold's and scares them off. Richie is upset and does some damage to the men's bathroom and asks Fonzie if he's (Richie) a coward. Potsie and Ralph come in, and Ralph says he saw an advertisement in the mail from Matsumo Takahashi who gives jujitsu lessons at Arnold's on Sunday nights. Joanie comes home from a date with Alan Lumpkin after punching him in the lip. Richie tells Howard that he wants to learn how to defend himself and take jujitsu lessons. Howard offers to teach Richie how to fight, but he himself couldn't get out of Richie's chin lock. Howard relents and gives Richie the $20 for the lessons. Matsumo "Arnold" Takahashi is teaching the class, and Richie, Joanie, Potsie, and Ralph show up. Takahashi reveals that he adopted the name "Arnold" so that he wouldn't have to change the sign outside the diner. Arnold flips Potsie and then Ralph. Joanie flips Richie. Richie comes up to Fonzie's apartment. He tells Fonzie that he's quitting jujitsu, and Fonzie teaches him the secret to being tough: intimidation. Richie tries to intimidate Frankie and Rocko at Arnold's, but it doesn't work. Fonzie says that he forgot to tell Richie that he has to have proved himself at least once, first. Richie goes crazy and slams Frankie's coat down and scares them off. Stephanie takes Richie home. At the house, Howard tries to get out of Marion's chin lock.
Songs in this episode:
"Hound Dog" by Elvis Presley (1956)
"You Send Me" by Sam Cooke (1957)
"Bye Bye Love" by The Everly Brothers (1957)