Jill Hennessy Dr. Jordan Cavanaugh Actor Miguel Ferrer Dr. Garret Macy Actor Ken Howard Actor Lorraine Toussaint Actor Ravi Kapoor Dr. Mahesh "Bug" Mahershalalhashbaz Ali Actor Steve Valentine Dr. Nigel Townsend Actor Kathryn Hahn Lily Lebowski Actor Ivan Sergei Actor Wallace Shawn Guest Star Susan Gibney Guest Star Tim Kring Executive Producer