The Best Episodes Written By Mellori Velasquez

When a highly sophisticated Tal operative evades FBI custody and flees to the Swiss embassy, the Cointel team must go under cover. What begins as a smooth counterintelligence operation quickly devolves into a tense hostage situation.

After the shocking shooting of a member of 20-Squad, Hondo and the team launch a citywide manhunt for the robbery crew responsible. Meanwhile, Deacon's plans for his future hit a snag, and Powell and Alfaro clash over a tricky issue.

Intelligence makes a gruesome discovery that leads Torres to go undercover at the juvenile detention center where he served time as a teen.

Cook works with a confidential informant for the first time in a robbery-murder case with links to a star college athlete.

Assistant State's Attorney Chapman assists Intelligence with a sensitive investigation that drudges up painful memories for Voight.

Emily's composure nosedives when she defends a young man charged with felony domestic violence. Also, Lola struggles with supporting Robin's job offer and causes a rift with Mark when she reprimands his girlfriend, Amy, for grandstanding in the courtroom.