***SPOILERS*** It's when his teenage daughter Helga, Barbara Harris, came home in tears from the local movie theater that her pop Clyde Royd,Dan Duryea, went ballistic in trying to track down the boys who hassled his little girl as well as tried to put their hands on her. With a by then composed Helga wanting to put the whole incident behind her Clyde, a major in the US paratroopers in WWII, planned to open military operations on the boys using his daughter Helga as bait. That's by having her get all dolled up and dress like a hooker to attract them and then use his military hand to hand combat skills to put her tormentors into the hospital with broken heads arms and legs! Determined to go through with his crazy plan poor Helga is soon involved with Clyde's efforts to commit assault and battery as well as possible murder. Something that Helga never expected, by telling her pop what happened to her in the movie house, to happen!
It's later when Clyde tracked down, with Helga as bait, one of the boys who hassled her Dom, Marco St. John, he did just that by busting his skull and in the process getting arrested by the police for assault with intent to kill. It was in fact Dom who felt really sorry for what he did and wanted to apologize to Helga but ended up with a broken head instead! As for Clyde he in fact liberated Helga from the emotional straight jacket that he put her into by getting, in having herself look pretty, noticed by boys her age whom he wanted her to be unappealing to. And now with a possible jail sentence hanging over his head Clyde realizes what a complete jerk he really is!
You see right away what a mental case Clyde is by him being so into violence that, I assume, he had his wife leave him to raise Helga all by himself. Dressed in pajamas while a the same time wearing his paratrooper combat boots while doing his job calling clients to sell them insurance isn't exactly normal by any stretch of the imagination. As for Clyde's apartment looking like, with an arsenal of guns bayonets and spent artillery shells, Hitler Bunker what can you expect from a nut like that anyway but a one way ticket to Sing Sing when he, like Clyde did here, finally snaps!
****SPOILER**** We get to see the mind set that Clyde has towards his daughter in keeping her as pure as the morning snow later in the "Naked City" episode. Reminiscing about his life in the US Military Clyde proudly tell the police investigating his attack on Dom that back in Japan his paratrooper friends used to beat up kidnap and possible murder Japanese men back in occupied Japan who didn't take kindly to GI's like himself who tried to get it on or date their women folks! And that he in enforcing law & order put three of his fellow paratroopers into the hospital,by barking their skulls, for doing it. That's exactly what he did to poor Dom who was only trying to be friendly with his daughter Helga, who in fact got to like him, when he almost ended up putting him on a cold slab in the city morgue!