After ignoring her calls for weeks, Sam tries to repair the relationship when Andy finds herself in a life and death situation.
Unsure of whether she can trust Sam, Andy leaves on an undercover mission with Nick Collins, leaving Sam sitting at the bar waiting for her at the end of season 3.
Meet Andy Mc Nally, who is empathetic (almost to a fault) and a born rescuer, is the star player in 15 Division’s finest batch of rookies.
Andy and Dov set a trap to see if the commissioner will take the bate while Gail and Nick are on watch, Gail and Nick are called away Andy decides to go catch him her self, she ends up catching Steve Peck, as he tries to escape he is caught leaving the building by Nick and Gail, as Gail is shocked to see that her brother is corrupt Nick and Andy have to arrest him and Jarvis is sent to arrest Santana, and Oliver is cleared.
6x09 Marlo goes into Labor with Sam not answering his phone and no help, Andy has to deliver Marlo and Sam's daughter, Sam finally shows up to hold his daughter, at the hospital Andy looks through the window at the family that she will never be apart of.
Season 4 finds Andy returning from her six months of undercover with Nick Collins, hoping to get things back on track with Sam, only to learn that he has moved on with a new cop, Marlo Cruz.
While it seems that Sam is immediately conflicted, and realizes that Andy didn't leave for undercover because she no longer has feelings for him, it looks like he may crack, but he continues his relationship with Cruz.
She is the ultimate rescuer and enabler, but quickly learns that she can't save the world because not everyone wants to be saved.