A psychopathic killer becomes the Major Crime Unit's top priority; Torello learns of Luca's plans for a nationwide sports-betting operation; Julie wants to start a family.

Torello introduces himself as a "friendly" cop to one of Luca's burglary crew after the crew's new man kills a woman; and the Torellos get some good news.

To ensure his takeover of a sports-betting operation, Luca sends Holman to St. Louis, where a politically motivated sheriff is overly friendly to Holman's MCU tail.