Cooper struggles with whether or not to punish Mason after he catches him stealing; Pete and Violet find it hard to split time with Lucas now that they're living apart; Addison makes changes in her home life to prepare for a potential new baby; Violet and Jake work with two women and a man involved in a polyamorous triad; meanwhile Amelia returns to the practice and realizes how badly she hurt Sheldon when she was abusing drugs.
Elenco: Kate Walsh , Benjamin Bratt , Paul Adelstein , KaDee Strickland , Caterina Scorsone , Matt Long , Taye Diggs , Amy Brenneman , Griffin Gluck , Brian Benben , Stephen Amell .