Nolan is given some life-changing news and invites Grace over for a home-cooked meal in his newly remodeled kitchen; each unit is tasked with following up on dormant cases in hopes of uncovering new leads.
[Season Finale] Officer Nolan mildly injures himself while chasing down a shoplifter and the local district attorney wants to charge the suspect with assault, despite Nolan's wishes; Lucy goes undercover; Lopez's wedding venue is seized by the FBI.
When professor Fiona Ryan's car window is smashed following a series of mysterious notes, Nolan volunteers to guard her house overnight; Lucy notices that Tim is being much nicer to his new trainee than he was with her and she does not like it.
Sgt. Grey supports Officer Nolan's desire to become a training officer and offers to ride with him for the day to get him ready; Tim and Lucy decide on their plans for Mother's Day and a romantic vacation.
Ross rushed into the ER, and he recognized a seizing woman was his one-night-stand from the night before. Meanwhile, Benton was busted by Dr. Keaton for his lack of compassion. Carol starts taking preparatory classes of medical school.
