Meredith regrets taking a step forward with Will; Maggie feels disconnected; Amelia considers her relationship with Owen; Catherine's arrival shakes things up with April and Jackson.
Meredith and Maggie offer Amelia support; Jo admits she's been keeping things from Alex; Arizona and Callie deal with the effects of their custody arrangement.
Miranda forms an advisory committee to recommend disciplinary action against Ben; April and Jackson try to get along for their baby's sake; Arizona's decision could affect her relationship with Callie.
