Some lieutenant comes to the precinct with four rookies. Apparently, this happens every year. Four guys in the top of the class get to learn while riding with four veteran cops. Capt. Block wants to do the normal assigning but this new guy wants to test out the "Cushman Theory" in which rookies are paired with veterans most like them.
You know what's coming....some poor rookie will get the assignment of Toody & Muldoon. In fact, it's the smartest cop in the graduating class, "Officer Reginald Corrigan" (Richard Morse) and he's paired because Muldoon is considered an extremely smart guy.
What happens with the smart guy enters the vehicle of Car 54 is what the story is about, with an interesting ending on Muldoon's part. There aren't many, but there are some laugh-out-loud lines here, a couple of them by Capt. Block. Otherwise, this is more of a study on human relations.