John Billingsley

as Sulphur John

as Self - Doktor Phlox(1 ep)

as Mr. Williams

as Jerry

as Dr. John Lehman(2 eps)

as Robert Walton(1 ep)

as Jeff

as Self(1 ep)

as Judge Joseph Holt(3 eps)

as Russo

as Chunky

as Wendy Jenkins' Boss(1 ep)

as Office Manager

as Self(1 ep)

as Bruce Hendricks(1 ep)

as Professor Staggs(1 ep)

as Dr. Bernard Weiss(1 ep)

as Self(1 ep)

as Male Curlisha

as Timothy Gipson(1 ep)

as Judge Brent Gordon(1 ep)

as Buddy(1 ep)

as Kevin Scott(1 ep)

as Mr. Swindell(1 ep)

as Lloyd(1 ep)

as Dr. Stewart(1 ep)

as Harry

as Kurt(1 ep)

as Cambis Borrin(1 ep)

as Father Reilly

as Abbie's ObGyn

as Dr. Klein

as Bill Weston(1 ep)

as Self

as Himself

as Lloyd Zane Miller

as Alvin Kapitski(1 ep)

as Gordon(1 ep)

as West Waters(1 ep)

as Mitchell Blair(1 ep)

as Watson(1 ep)

as Dr.Mize(1 ep)

as Edwin Shaw(1 ep)

as Self

as Dr. Phlox

as Dr. Phlox

as Dr. William Crispin(13 eps)

as Dr. Lloyd Madden(4 eps)

as Self

as Sam

as Mr. DeLarge(2 eps)

as Dr. Phlox

as Malcolm Eddery

as Bum

as Doug

as Roger Halsted(1 ep)

as Father Alfred McKavee

as Stan Jacobson(2 eps)

as Norman Miller(1 ep)

as Dr. Drew(1 ep)

as Eugene Goodman(1 ep)

as Heidecker(2 eps)

as Dr. Henklefust (voice)(1 ep)

as Professor West

as Prof. James Kellogg

as Dean Randolph(1 ep)

as Doug Ouellet(1 ep)

as Harvey Larson(1 ep)

as Coswell(1 ep)

as Jonah Henry

as Ellis Mars(1 ep)

as Mike Spencer(17 eps)

as Ira Grossman

as Phil

as Phil(1 ep)

as Brady

as Daniel Foote(1 ep)

as Brad

as Harry

as Langdon

as Harrison McKendrick

as Egan Foote(13 eps)

as Dogcatcher Doyle

as Mike(1 ep)

as Hugh Rollins(1 ep)

as Dr. Edward Harkness(1 ep)

as Terrence Steadman(2 eps)

as Tom Newman(1 ep)

as Jacob Nolston(2 eps)

as Cecil Arthur(1 ep)

as Mr. Rothman

as Himself

as Self

as Chae

as George Marks (2005)(2 eps)

as Jackson Scott(1 ep)

as Ben White(1 ep)

as Mr. Jensen

as Paramedic

as Harry(1 ep)

as Lie Detector Coach

as Michael Latham(3 eps)

as Alan(1 ep)

as Phlox(97 eps)

as Driving Instructor

as Andrew Gindes

as Boring Man(1 ep)

as Hammond

as Barry

as Paul Cydon(1 ep)

as Mr. Remmy(1 ep)

as Prof. Miles Ballard(13 eps)

as John Waddington

as Dr. Royce(1 ep)

as Barto's Doctor(1 ep)

as Dr. John Fallow(1 ep)

as Edward Duke(1 ep)

as Bebe's Attorney(1 ep)

as Irate Driver

as Dr. Andrew Pike

as FBI Agent #1

as Delivery Guy(1 ep)

as Inspector Hotchkiss(1 ep)

as Mr. Snow(1 ep)

as Lee

as Simon Coombs(1 ep)

as Simms (segment "The Wall")(1 ep)

as Robert Schmidt(1 ep)

as Technician

as Clifford(2 eps)

as Kenny(1 ep)

as Kenny (archive footage)(1 ep)

as Headmaster(1 ep)

as Emo Daniel(1 ep)

as Peter Garfield(1 ep)

as Eddie Dagabosian(1 ep)

as Timothy 'Timmy the Geek' Landau(1 ep)

as Officer Jenkins

as Patient(1 ep)

as Linus

as Doctor Ben(1 ep)