Naomi returns for Addison's wedding day; Cooper struggles in his role as a father.

Cast: Kate Walsh, Benjamin Bratt, Paul Adelstein, KaDee Strickland, Brian Benben, Caterina Scorsone, Griffin Gluck, Taye Diggs, Amy Brenneman, Audra McDonald, Matt Long, Diane Farr, Justina Machado, Emily Rios, Sarah Ramos