Derek Waters
Himself - Host / Various Characters (71 eps)
Bennie Arthur
Various (11 eps)
Maria Blasucci
Various (10 eps)
Craig Cackowski
Various (10 eps)
Jeremy J. Tutson
Various (10 eps)
Tymberlee Hill
Various (9 eps)
Sarah Burns
Various (8 eps)
Michael Daniel Cassady
Various (7 eps)
Adam Nee
Various (7 eps)
Jack McBrayer
Alan Freed (5 eps)
Daryl J. Johnson
Narrator (5 eps)
Jason Ritter
Elisha Gray (4 eps)
Tony Hale
Edward Cope (4 eps)
Colin Hanks
Fred Rogers (3 eps)
Jack Black
William Mulholland (3 eps)
Johnny Knoxville
Ponce De Leon (3 eps)
Chris Parnell
Thomas Edison (3 eps)
Taran Killam
Frédéric Auguste Bartholdi (3 eps)
Kyle David Crosby
Scientist (3 eps)
Michael Coleman
Various (3 eps)
Eric Edelstein
Himself - Narrator (3 eps)
Mort Burke
Various (3 eps)
Tim Baltz
Various (3 eps)
Jesse Plemons
Edgar Allan Poe (2 eps)
Stephen Merchant
Abraham Lincoln (2 eps)
Jenny Slate
Herself - Storyteller (2 eps)
Michael Cera
Maurice Cohen (2 eps)
Natasha Leggero
Herself - Narrator (2 eps)
Rob Huebel
Governor Trevino (2 eps)
Bob Odenkirk
The Guy (2 eps)
Georgia Hardstark
Herself - Storyteller (2 eps)
Richard Riehle
Ralph Himmelsbach (2 eps)
Ken Marino
Masterpiece (2 eps)
Jaleel White
Grandmaster Caz (2 eps)
Alia Shawkat
Virginia Hall (2 eps)
Paul Scheer
Carl Sagan (2 eps)
Craig Anstett
Various (2 eps)
Rich Fulcher
Self - Narrator (2 eps)
Tommy Blacha
Self - Narrator (2 eps)
Nathan Fielder
Bob Woodward (2 eps)
Matt Walsh
Joseph Pulitzer (2 eps)
Tim Heidecker
Cop (2 eps)
Brett Gelman
Art Thief (2 eps)
Lisa Bonet
Rosa Parks (2 eps)
Terry Crews
Donald 'Cinque' DeFreeze (2 eps)
Seth Weitberg
Himself - Narrator (2 eps)
Mark Gagliardi
Himself - Narrator (2 eps)
Matt Gourley
Himself - Narrator (2 eps)
Aubrey Plaza
Sacagawea (2 eps)
Allan McLeod
Himself - Narrator (2 eps)
Ben Folds
Self (2 eps)
Trace Lysette
Sylvia Rivera (2 eps)
Zach Gilford
Jim Abbott (1 eps)
Adrianne Palicki
Kate Warne (1 eps)
Will Ferrell
Roald Dahl (1 eps)
Octavia Spencer
Harriet Tubman (1 eps)
Maestro Harrell
Louis Armstrong (1 eps)
Andre Royo
King Oliver (1 eps)
Jason Momoa
Jean Lafitte (1 eps)
Maya Rudolph
Griselda Blanco (1 eps)
Josh Hartnett
Clark Gable (1 eps)
Justin Long
Arno Penzias (1 eps)
Greg Kinnear
Thaddeus Lowe (1 eps)
Christopher Meloni
Othniel Marsh (1 eps)
Tess Lynch
Herself - Storyteller (1 eps)
Mark Proksch
Himself - Storyteller (1 eps)
Kat Dennings
Kentucky Daisey (1 eps)
Ellie Kemper
Nellie Bly (1 eps)
Haley Joel Osment
Kid Blink (1 eps)
Noah Wyle
Thomas Nast (1 eps)
Jason Alexander
William Tweed (1 eps)
Zach Woods
Lee Duncan (1 eps)
Ryan Phillippe
Benjamin Hayes (1 eps)
Giancarlo Esposito
Andrés Pico (1 eps)
Jason Mantzoukas
Pope (1 eps)
Patton Oswalt
Mac Brazel (1 eps)
Thomas Lennon
Major Marcel (1 eps)
Parker Posey
Mary Phelps Jacob (1 eps)
Henry Winkler
Zenas Fisk Wilber (1 eps)
Michael McKean
Carl Laemmle (1 eps)
Sam Rockwell
Bugsy Siegal (1 eps)
Donald Faison
Joe Louis (1 eps)
Dennis Quaid
Lucky Luciano (1 eps)
Nathan Fillion
Wernher von Braun (1 eps)
Chelsea Peretti
Ann Druyan (1 eps)
Adam Devine
Pavel Belyayev (1 eps)
Blake Anderson
Alexey Leonov (1 eps)
Liev Schreiber
Victor Lustig (1 eps)
Randall Park
Himself - Storyteller (1 eps)
Aaron Takahashi
Frank Emi (1 eps)
Grant Imahara
Frank Inouye (1 eps)
Rachel Bloom
Herself - Storyteller (1 eps)
Kimiko Glenn
Maya Lin (1 eps)
Jon Gabrus
Himself - Storyteller (1 eps)
Jennie Pierson
Herself - Storyteller (1 eps)
Solomon Georgio
Himself - Storyteller (1 eps)
Shannon Woodward
Ida Tarbell (1 eps)
David Koechner
John Pastore (1 eps)
John Ennis
John D. Rockefeller (1 eps)
David Harbour
Vietnam Memorial Head (1 eps)
Kyle Mooney
Himself - Storyteller (1 eps)
Alison Rich
Herself - Storyteller (1 eps)
Kirsten Dunst
Agatha Christie (1 eps)
Jayma Mays
Florence Schaffner (1 eps)
Vanessa Bayer
Mary Gillespie (1 eps)
Claudia O'Doherty
Herself - Storyteller (1 eps)
Steven Weber
Lomax (1 eps)
Will Forte
Edwin Booth (1 eps)
Jonathan Ames
Junius Booth (1 eps)
Adam Scott
John Wilkes Booth (1 eps)
Dave Grohl
Memphis Mafia Member (1 eps)
Fred Willard
Deep Throat (1 eps)
Kyle Kinane
Self - Narrator (1 eps)
Joe Lo Truglio
Al Capone (1 eps)
Matt Besser
Edwin Stanton (1 eps)
Ike Barinholtz
August Spies (1 eps)
Charlie Finn
Cpt. 'Black Jack' Bonfield (1 eps)
Eric Filipkowski
Abraham Lincoln (1 eps)
Will Sasso
Frank Nitti (1 eps)
Moshe Kasher
Albert Parsons (1 eps)
James Atkinson
Himself - Narrator (1 eps)
Bill Hader
John Pemberton (1 eps)
Simon Helberg
Frank M. Robinson (1 eps)
Rob Riggle
J. Edgar Hoover (1 eps)
Lamorne Morris
Martin Luther King Jr. (1 eps)
Kevin Nealon
The Grand Dragon (1 eps)
Abdul Abukusumo
South American (1 eps)
Jen Kirkman
Herself - Narrator (1 eps)
Erin Rohr
Herself - Narrator (1 eps)
Michael Rohr
Himself - Narrator (1 eps)
Chris Romano
Himself - Narrator (1 eps)
Winona Ryder
Mary Dyer (1 eps)
Martin Starr
Art Thief (1 eps)
June Diane Raphael
Isabella Stewart Gardner (1 eps)
Connie Britton
Patricia Shaheen (1 eps)
Nick Offerman
Johnny Cool (1 eps)
Aidan Potter
Various (1 eps)
Zachary Burke
Various (1 eps)
Clint Culp
Policeman (1 eps)
Steve Berg
Various (1 eps)
Beth Cahill
Onlooker (1 eps)
Benjamin Poe
Policeman (1 eps)
Kaci Beeler
Herself - Interviewee (1 eps)
Artemis Pebdani
Herself - Narrator (1 eps)
Derrick Beckles
Himself - Narrator (1 eps)
Steve Little
Mark Twain (1 eps)
Ben Hoffman
Newscaster (1 eps)
Kristen Wiig
Patty Hearst (1 eps)
Ally Johnson
Herself (1 eps)
Paco Romane
Himself (1 eps)
Paget Brewster
Herself - Narrator (1 eps)
Lucius Dillon
Himself - Narrator (1 eps)
Jason Schwartzman
Ralph Nader (1 eps)
Owen Wilson
John Harvey Kellogg (1 eps)
Luke Wilson
Will Keith Kellogg (1 eps)
Alfred Molina
Sir Arthur Conan Doyle (1 eps)
Polly W. LePorte
Kellogg Patient (1 eps)
BJ Porter
Himself - Narrator (1 eps)
Alie Ward
Herself - Narrator (1 eps)
Kumail Nanjiani
Lakota Chief (1 eps)
Bradley Whitford
William Jennings Bryan (1 eps)
Casey Wilson
Dolly Parton (1 eps)
Dakota Black
Lakota Indian (1 eps)
A.J. Culp
Jolene (1 eps)
John A. Lorenz
Lakota Indian (1 eps)
Michael Kearney
Interviewee (1 eps)
Lacie Madison
Party Guest (1 eps)
Preston Flagg
Himself - Narrator (1 eps)
Timm Sharp
Billy the Kid (1 eps)
Andy Daly
Teddy Roosevelt (1 eps)
Jake Johnson
William B. Travis (1 eps)
Horatio Sanz
Gen. Santa Anna (1 eps)
Zach Paez
Various (1 eps)
Joseph Billingiere
Various (1 eps)
Raymond Ochoa
Various (1 eps)
Ricardo Tirado
Various (1 eps)
Dan Cooley
Rough Rider (1 eps)
Corey Weber
Tim- The Cowboy (1 eps)
Joseph Zinsman
Soldier (1 eps)
Mariah Iman Wilson
Claudette Colvin (1 eps)
Jerry Minor
Edgar Nixon (1 eps)
Jordan Peele
Percy Julian (1 eps)
Amber Ruffin
Herself - Narrator (1 eps)
Morgan Murphy
Herself - Narrator (1 eps)
Michael Coleman
Various (1 eps)
Juno Temple
Sybil Luddington (1 eps)
Michaela Watkins
Nurse (1 eps)
Laura Dern
Nellie Bly (1 eps)
Eric Falconer
Himself - Narrator (1 eps)
Suzi Barrett
Herself - Narrator (1 eps)
J.D. Ryznar
Himself - Narrator (1 eps)
Lauren Lapkus
Normal Woman (1 eps)
Retta
Sylvia Robinson (1 eps)
Da'Vone McDonald
Big Bank Hank (1 eps)
Ron Funches
Herc (1 eps)
Jon Daly
Kris Kristofferson (1 eps)
David Wain
Himself - Narrator (1 eps)
Colton Dunn
Himself - Narrator (1 eps)
Sophia Bush
Bonnie Raines (1 eps)
Jenna Fischer
Katharine Wright (1 eps)
Dave Foley
Alexis Pulaski (1 eps)
Ali Ghandour
Prince Aly Khan (1 eps)
Lin-Manuel Miranda
Himself (1 eps)
Questlove
Himself (1 eps)
Christopher Jackson
Himself (1 eps)
Alexandra Grey
Marsha P. Johnson (1 eps)
Paul Rust
John Wojtowicz (1 eps)