'Chicago PD' Sneak Peek: Ruzek and Halstead Go Undercover, But It Doesn't End Well (Exclusive)

An all-new episode airs Wednesday, Feb. 17 at 10 p.m. ET/PT on NBC. After a series of deadly ambushes, the team goes undercover to bring down a dangerous new drug dealer who is determined to push out the competition. Ruzek’s (Patrick Flueger) informant proves to be a loose cannon that could upset the whole operation.