Robert Walker Jr. stars as Peter, a wimpy longshoreman (though I didn't think such a thing existed). A nasty loan shark catches him late at night and begins working Pater over. When Peter tries to defend himself, the shark says "I'll kill you!!" and Peter, in desperation, grabs an iron bar and hits the attacker upside the head. He was definitely justified for doing this and if he hadn't struck the much larger men, he would have surely died instead.
When the body of the dead loan shark is found, Peter assumes he killed him and so he turns himself in to the police. But, when Quincy does the autopsy, he finds that a baling hook was the weapon that killed the guy. Quincy assumes that Peter is lying and that he DID murder the guy with the hook--though most viewers will immediately assume that there was a second man who killed the guy AFTER Peter left. When Quincy eventually comes to this realization himself, proving this is next to impossible because now Peter is bragging that he killed the shark, as everyone hated the loan shark AND everyone used to think Peter was a total wimp. Now, Peter is willing to go to jail--just to prove to everyone that he's a tough guy! What a moron! Up until the very end in the courtroom scene, this was a very good and interesting episode. BUT, when Quincy confronted the real murderer and the killer, in a "Perry Mason"-like moment, admitted to the court that he did it--even though he probably could have gotten away with it! Duh! Sloppy ending to a good episode drop this score down to 6.