Ashton Kutcher Walden Schmidt Actor Jon Cryer Alan Harper Actor Conchata Ferrell Berta Actor Ryan Stiles Dr. Herb Melnick Guest Star D.B. Sweeney Larry Guest Star Clark Duke Barry Guest Star Maggie Lawson Ms. McMartin Guest Star Alessandra Torresani Kathy Guest Star Lyn Alicia Henderson Patricia Guest Star Adriana Karras Rachel Ray Guest Star Ginny Jones Hot Nurse Guest Star Chuck Lorre Executive Producer Don Reo Executive Producer, Writer Jim Patterson Executive Producer, Writer Steve Tompkins Writer Warren Bell Writer Matt Ross Writer Max Searle Writer James Widdoes Director