Hank Katts is a canine police officer with the Bay City Police Department who is teamed with a crime-fighting German shepherd dog named Rudi. Katts's courage and street smarts make him a good police officer, but his rebellious, questioning side makes him a difficult partner to work with. That is why he's assigned to the K-9 Corps, the police dog unit. In the US, the title was changed to Rin Tin Tin: K-9 Cop and the dog’s name was changed to Rin Tin Tin (Rinty)