The new Grey’s Anatomy spin-off will air a two-hour episode in May, and at the moment the working title is Private Practice. So far the cast is as follows:

Kate Walsh (Dr. Addison Montgomery), Timothy Daly (Pete), Taye Diggs (Jackson), Amy Brenneman (Violet), Chris Lowell (Dell), Merrin Dungey (Naomi), Bellamy Young (Kathy) and Jane Clark (Nurse).

Kate Walsh will not appear on two episodes of Grey’s when Addison takes a temporary leave of absence from Seattle Grace and decides to take a road trip to Los Angeles to visit some old med school friends; that’s where the spin-off will pick up.