Jill Hennessy Dr. Jordan Cavanaugh Actor Miguel Ferrer Dr. Garret Macy Actor Ken Howard Actor Mahershala Ali Actor Ravi Kapoor Dr. Mahesh "Bug" Mahershalalhashbaz Ali Actor Steve Valentine Dr. Nigel Townsend Actor Kathryn Hahn Lily Lebowski Actor Lily Knight Guest Star Lorraine Toussaint Actor Ivan Sergei Actor Soren Fulton Guest Star Hart Bochner Guest Star Mariel Hemingway Guest Star James Pickens Jr. Guest Star Jerry O'Connell Det. Woody Hoyt Guest Star Susan Gibney Guest Star Clayton Rohner Guest Star Wallace Shawn Guest Star Michael T. Weiss Guest Star William Russ Guest Star Tim Kring Executive Producer