Vitamin C

Julia Stiles

William Dafoe

Tim Robbins

Sam Donaldson

Lynn Whitfield

Bill O'Reilly

Matthew McConaughey

Terry Bradshaw

Topher Grace

David Boreanaz

Dyan Cannon

James van der Beek

Tim Blake Nelson

Dave Grohl

Kermit the Frog

Jessica Alba

Wanda Sykes

Greg Germann

Chris Rock

Kelly Ripa

Ted Danson

Joe Pantoliano

Heather Locklear

Warren Christopher

Martin Short

Ed Burns

Carmen Electra

Javier Bardem

Chris Meloni

Mary Stuart Masterson

Jeff Varner

Denis Leary

Richard Roeper

Richard Lewis

Mark Harmon

Jennifer Love Hewitt

Lisa Ling

Amy Sedaris

D.L. Hughley

Steven Weber

Paul Reubens

Bob Costas

Damon Wayans

Brittany Daniel

Don Hewitt

Rachael Leigh Cook

Tom Green

Tom Cavanagh

Eric McCormack

Dominic Chianese

No Guest

Robert Patrick

Chris Robinson

James Van Der Beek

Richie Sambora

Patricia Richardson

Maura Tierney

Denise Quiñones

Heath Ledger

Jerry Springer

Richard Schiff

Bradley Whitford

Leah Remini

Jake Johannsen

Richard Belzer

Al Roker

Bernie Mac

Joe Queenan

Gene Simmons

David Duchovny

Jeff Greenfield

Martin Short

Michael Rapaport

Alec Baldwin

Mýa

Sam Robards

Johnny Knoxville

Jet Li

Bridget Fonda

Sean Hayes

The Spice Girls

James Woods

Vince Vaughn

Jon Favreau

Maria Bartiromo

Ed Norton

Hank Azaria

Larry Miller

Paul Giametti

Senator Joe Lieberman

Senator John McCain

Jerri Manthey

Peter Krause

Jackie Chan

Janeane Garofalo

Andie MacDowell

Joe Rogan

Tara Reid

Jason Biggs

David Rakoff

John Carpenter

Seth Green

Fabio

Cuba Gooding Jr.

Griffin Dunne

Will Ferrell

Kevin Smith

They Might Be Giants

Dave Navarro

September 20, 2001 - The Comeback episode

Frank Rich

Aaron Brown

Jeff Greenfield

Tenacious D

Kelsey Grammer

Jim Belushi

Stephen Morse

Kate Beckinsale

Owen Wilson

Jeremy Piven

John Miller

Emeril Lagasse

Lorraine Bracco

Snoop Dogg

Fareed Zakaria

Lance Bass

Don Dahler

Greta Van Susteren

Jeff Bridges

Rob Morrow

Richard Holbrooke

Kevin Spacey

Paul Rudd

P.J. O'Rourke

George Stephanopoulos

Jennifer Saunders

Steve Kroft

Anne Robinson

Carson Daly

John Stamos

Edward Burns

Star Jones

Jennifer Garner

David Halberstam

Nadine Strossen

John Edward

Marg Helgenberger

Ted Danson

Stephen Colbert as Al Sharpton

Dave Gorman

Janeane Garofalo

Tracey Ullman

Elijah Wood

Peggy Noonan

Gary Sinise

Jamie Foxx