Guest Stars Joanna Cassidy as Joan Hunt Luke Perry as Dr. Charlie Stafford Marisa Ramirez as Officer Riley Dunn Sharon Lawrence as Julia Stone Craig Bierko as Dr. Derrick Malcolm Chase Kim as Officer Hawley Jude Ciccolella as Detective Mo Childs Hannah Leigh Dworkin as Darby Stone Co Starring Allisyn Ashley Arm as Celeste Patrick Quinlan as Orderly One Betsy Zajko as Nurse Betsy Karthik Srinivasan as CSU Tech Pamela Chan as Pixie Girl