Guest Stars Robert Maschio as Dr. Todd Quinlan Eliza Coupe as Dr. Denise "Jo" Mahoney Betsy Beutler as Katie Aziz Ansari as Ed Julia Campbell as Mrs. Fremont Co Starring Eric Jacobson voices Grover Kevin Clash voices Elmo Caroll Spinney voices Oscar the Grouch Lak Rana as Another Intern David Goryl as Mr. Fremont Stephanie D'Abruzzo voices A.M. Muppet (Ex Ray)