West arrests his land lord for dealing drugs outside of his apartment, which results in him losing said apartment as it is now a "house of ill repute." Nolan receives a new TO in Detective Armstrong as he discovers his ex-flame, Grace Sawyer, is a doctor at a local hospital. Chen is upset with Officer Bradford as he is extra hard on her for recent events. He states it's because Chen didn't report his suicidal tendencies during the recent terrorist attack but she points out that he has a bunch of other things she should have reported regarding his ex-wife. The pair also meet an elderly bounty hunter that used to work for the LAPD.
Nolan, meanwhile, investigates a home invasion where a teenage boy was killed. The home invaders are then tracked down by the victim's father who attempts to enact revenge. In the end, the father commits suicide. West ends up moving in with Chen as her roommate after almost taking residence in a trailer with a fellow policeman.
- Amicable Exes: Averted. Grace is still surprised at how angry she is at Nolan twenty years later. They reconcile at the end.
- Bounty Hunter: Rex has taken up this job after retiring from the force. He tries to leverage special favors from Bradford and Chen to mixed results.
- Cool Old Guy: Rex is an ex-LAPD bounty hunter.
- Driven to Suicide: Matt Christiansen, the father of the victim, kills himself rather than go to jail.
- Easily Forgiven: Averted. Grace still holds a grudge twenty years later at Nolan leaving her via note.
- Hospital Hottie: Grace is a very attractive medical doctor.
- Hypocrite: Chen points out that Bradford is mad for not reporting his brief suicidal thoughts but expected her to cover for him when he was doing favors for his ex-wife, Isabel.
- New Old Flame: Grace Sawyer was Nolan's girlfriend in college before he left to be with his wife.
- The One That Got Away: She and John had a brief but passionate relationship in college and John is sure she would have been the love of his life if they had stayed together. However, John found out that his ex was pregnant with Henry and he broke things off with Grace to do what he felt was the right thing by marrying his ex and dropping out of school to start working.
- Papa Wolf: Matt Christiansen is driven mad by the murder of his son.
- Vigilante Man: Matt Christiansen attempts to kill the men who murdered his son.
- What the Hell, Hero??: Upon her introduction, she’s still pissed at Nolan over the way he broke up with her when he found out Sarah was pregnant. She says she thought she was over it, but talking to him again was reminding her of all the anger she's since suppressed about the break-up.
