After Winston graduates from the Police Academy, Nick and Coach worry when they see his new training officer. Meanwhile, Jess uses Schmidt to try and influence a councilwoman to stop the night construction taking place outside the loft.
Addison returns to Seattle Grace to perform a procedure on Mark's pregnant daughter; Cristina is assigned the lead on a complicated surgery.
When Los Angeles’ blood supply is hacked and deemed unusable because of fear it’s been tainted, Team Scorpion must find the culprit in order to save a young girl in desperate need of a heart transplant.
Max's babysitting gig with Peach is in peril if the cupcakes she and Caroline deliver to Peach's socialite friend aren't perfect.
The Walkers come together when Trish goes into labor two weeks early; Justin reconnects with Rebecca after she learns Holly has evidence implicating Tommy's guilt in the illegal Ojai land deal; Kevin follows through with McCallister's wishes to continue his bid for governorship.
