Jill Hennessy Dr. Jordan Cavanaugh Actor Miguel Ferrer Dr. Garret Macy Actor, Director 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 Ethan Sandler Guest Star Jerry O'Connell Det. Woody Hoyt Actor Leslie Bibb Det. Tallulah "Lu" Simmons Actor Charles Mesure Guest Star Henry Winkler Guest Star Josh Duhamel Guest Star Alex McKenna Guest Star Tay Blessey Guest Star Alicia Coppola Guest Star Vanessa Marcil Guest Star Tim Kring Executive Producer Allan Arkush Director