"Chinatown" served as the series' final 2-part storyline, about the restaurant The Jade Palace, where a murder was perpetrated by a gang of youths known as The White Dragons, dealing heavily in drugs and protection. All Captain Miller has is a single witness, waiter Victor Ling (Chao-Li Chi), who claims to have seen nothing, obviously frightened for his life. Barney receives orders from the District Attorney to keep vigil with Ling, now designated a material witness, for a period of 30 days, until he agrees to cooperate. This means that Harris and Dietrich will be bunking together like they used to in bygone days, to Levitt's unrestrained delight. Leonard Stone (last of five) plays Sidney M. Botnik, who creates a disturbance at his own Wild West Waffle Hut because its doors were just padlocked due to nonpayment of Internal Revenue taxes. Fred Sadoff (last of six) plays the unrepentant IRS agent, determined to make an example of the downtrodden Botnik, without regard to notifications, warrants or court orders ("we're the IRS, we can do that!"). Miss Caroline Fitzjames (Joanna Barnes), a twice widowed lady of means, reports that a valuable $40,000 diamond brooch was stolen from around her neck. George Murdock (tenth of twelve) returns for the ninth time as Lt. Ben Scanlon from Internal Affairs, three months too late to hassle Wojo about his phony paternity suit (covered in the 8th season opener "Paternity"). On his way out, he uncharacteristically becomes entranced by the attractive Miss Fitzjames, to the point where both are distracted (Scanlon: "nice girl!").
