Episode Detail: They Say It's Your Birthday - The Beat
On Zane's birthday, he learns it was Beatrice who torched his apartment; and Dorigan and Marinelli respond to a domestic-violence call; and a homicide. Richard Belzer has a cameo as his “Homicide: Life on the Street” character, John Munch. Beatrice: Heather Burns. Elizabeth: Poppy Montgomery. Dorigan: Derek Cecil. Zane: Mark Ruffalo.