Dr. Lionel Budgie, Mason Fairbanks, Nigel

Kara DioGuardi

Slick Publisher

Helen Lovejoy, Maude Flanders, Miss Hoover, Luann Van Houten, Nurse, Others, Additional Voices, Elizabeth Hoover, Librarian, Various...

Prime Minister, Severus Snape

Happy Little Elf, Rubber Baby Buggy Bumper Babysitting Service Receptionist

Fox Mulder

Ellen DeGeneres

Mrs. Burns

Troy McClure, Lionel Hutz, 'Look at that stupid kid!', Bill Clinton, Cable Guy, Charlton Heston, Commercial Announcer #2, Congressman, Duff Gardens Commercial Voice-Over, Evan Conover...

Leslie Mann

Randy Jackson

Apu

Dana Scully

Edna Krabappel, Crowd, Ms. Melon, Others, Spirit #1, Woman in Bar

Milhouse Van Houten, Jimbo Jones, Rod Flanders, Janey Powell, Sarah Wiggum, Additional Voices, Janey, Others, Boy, Dolph...

Himself

Lunchlady Doris, Complaints Booth Clerk, Della, Ice-Cream Lady, Lurleen Lumpkin, Roxie, Shotgun Pete's Receptionist, Various, Waitress

Russell Brand

Himself, Penn Jilette

Richard Dean Anderson

School Therapist

Martin Prince, Sherri, Terri, Uter, Wendell, Additional Voices, Lewis, Martin, Others, Various...

Francesca

The Great Raymondo

Cecil Terwilliger, Felix