Jill Hennessy Dr. Jordan Cavanaugh Actor Miguel Ferrer Dr. Garret Macy Actor Ken Howard Actor Ravi Kapoor Dr. Mahesh "Bug" Mahershalalhashbaz Ali Actor Steve Valentine Dr. Nigel Townsend Actor Kathryn Hahn Lily Lebowski Actor Ivan Sergei Actor Jennifer Finnigan Actor Jerry O'Connell Det. Woody Hoyt Actor Mathew St. Patrick Guest Star Eugene Byrd Guest Star Daphne Maxwell-Reid Guest Star James Gammon Guest Star Michael McCarty Guest Star Jack Gwaltney Guest Star Cornelia Hayes Guest Star Bellina Logan Guest Star Tim DeZarn Guest Star Tim Kring Executive Producer