Dr. Owen Maestro / Rob Huebel (78 episodes, 2008-2016)
Dr. Blake Downs / Cutter Spindell / Rory Spindell / Flake the Clown (77 episodes, 2008-2016)
Dr. Glenn Richie / Just Falcon / Dr. Glenn Rosensweig / Ron Donald (68 episodes, 2008-2016)
Dr. Lola Spratt / Lynn Williams / Nurse Lola Spratt (67 episodes, 2008-2016)
Chief / Lydia Dunfree / Lady Jane Bentick-Smith / Jane Bentick-Smith (66 episodes, 2008-2016)
Sal Viscuso / A Friend (61 episodes, 2008-2016)
Sy Mittleman / Fred Nunley / Jerry (58 episodes, 2010-2016)
Dr. Cat Black / Dixie Peters (55 episodes, 2008-2016)
Nurse Dori / Glarion Rudge / Nicky's Mom (55 episodes, 2008-2016)
Dr. Valerie Flame / Ingrid Hagerstown (42 episodes, 2010-2016)
Chet / Mark Splorn / Hobo Clown (26 episodes, 2008-2016)
Nurse Beth / Melinda Waller (20 episodes, 2010-2016)
David Wain / Rabbi Jewy McJewJew / Rabbi McJewJew / Square Dance Caller (20 episodes, 2008-2016)
Lt. Chance Briggs / Detective Chance Briggs (13 episodes, 2008-2015)
Dr. Brian (10 episodes, 2010-2015)
Nurse Kulap / Nurse Sandy / Kulap (8 episodes, 2008-2012)
Dr. Nate Schachter / Tug Spano / Butch (7 episodes, 2008-2015)
Nicky / Little Nicky / Dr. Geza (6 episodes, 2008-2011)
Derrick Childrens / Arthur Childrens (6 episodes, 2010-2016)
Nurse Robin / Jamie Denbo / Mother / Zipporah (6 episodes, 2008-2015)
Dr. Max von Sydow / Dr. Max Von Sydow (5 episodes, 2008-2011)
Dr. Jason Mantzoukas / Dr. Nate Corddry / Prosecuting Attorney (5 episodes, 2008-2012)
Dr. Ed Helms / TV Announcer (5 episodes, 2008-2010)
Sir Tinkle Button (4 episodes, 2010-2016)
Hospital Administrator / Prop Master (3 episodes, 2008-2012)
Catlike Doctor / Blake's TV Wife (3 episodes, 2008-2010)
Madonna / Freddie Mercury / Kate Upton / Louis C.K. / Reporter / Rihanna (3 episodes, 2012-2015)
Captain Tripper / Cop (3 episodes, 2010-2015)
Chief in Her 20s / Maxine Spratt / Young Chief (3 episodes, 2010-2012)
Dr. Antoine / Hoss O'Brien / Soldier 1 (3 episodes, 2010-2013)
Louis La Fonda (3 episodes, 2010-2012)
Whitney (2 episodes, 2010-2012)
Baby Chief / Mainframe (2 episodes, 2012-2016)
Nils Vildervaan (2 episodes, 2015-2016)
Casey Klein / Harmony (2 episodes, 2010-2011)
Lollipop Salesman / Terry (2 episodes, 2010-2013)
Old Timey Psychiatrist / Rex Hilliard (2 episodes, 2010-2016)
Dad of the Kid / Drunk Daddy (2 episodes, 2010-2013)
Dutch Tourist / Kerri Kenney-Silver (2 episodes, 2010-2013)
Patient #2 / Soldier (2 episodes, 2013)
Dr. Parker (2 episodes, 2016)
Young Cancer Patient (2 episodes, 2008)
Nurse Morgan (2 episodes, 2011-2013)
Shane / The Voice of Antonio Zavala (2 episodes, 2008-2011)
Administrator - Ribbon Cutter / Ribbon Cutter (2 episodes, 2008)
Ben Hayflick (2 episodes, 2010)
Dancer / Dancer #3 (2 episodes, 2011-2016)
Kaiju / Mr. Lee (2 episodes, 2011-2013)
Owen's Mom / Writer #2 (2 episodes, 2011-2012)
Dr. Parker's Guard (2 episodes, 2016)
Office Bailnt / Tucker (2 episodes, 2010-2016)
Kid / Terry (2 episodes, 2010-2015)
Circus Clown / Dr. Adair (2 episodes, 2010-2011)
Big Guard (2 episodes, 2016)
Pat / Roxanne (2 episodes, 2011-2015)
Briggs / Father O'Boylan (2 episodes, 2012-2016)
Fairy / Flight Attendant 3 (2 episodes, 2012-2013)
'Weird Al' Yankovic / Young Michael (2 episodes, 2013-2015)
Dr. Robert 'Bobby' Fiscus (2 episodes, 2008)
Private Corcoran / Trustafarian (2 episodes, 2010-2013)
Dr. Fantastic / Dr. Frantastic (2 episodes, 2010)
Cameraman / Dr. Trotter (2 episodes, 2010)
Flight Attendant 2 / Person 2 (2 episodes, 2011-2012)
Dr. Martha Kriete / Female Doctor (2 episodes, 2015-2016)
Doctor Little Girl (2 episodes, 2013-2016)
Chairman (1 episode, 2012)
Cop / Police Officer (1 episode, 2012)
Self (1 episode, 2010-2011)
Haley (1 episode, 2010)
David Wain's PA / Pranked Nurse (1 episode, 2010)
Lulu Pratt (1 episode, 2012)
Braedon Downs (1 episode, 2012)
Headmistress (1 episode, 2012)
Leo Richie (1 episode, 2015)
Valerie Flume (1 episode, 2012)
Young Briggs (1 episode, 2015)
Mike (1 episode, 2011)
Oren Maestro (1 episode, 2012)
Missy (1 episode, 2015)
Brad Lendricks (1 episode, 2015)
Ma Richie (1 episode, 2015)
Bike Clerk (1 episode, 2015)
Concession Clerk (1 episode, 2016)
Intern (1 episode, 2011)
Kitty Black (1 episode, 2012)
Patient #1 (1 episode, 2013)
Esther (1 episode, 2015)
Dan Richards (1 episode, 2015)
Sauna Staffer (1 episode, 2015)
Alan Stack (1 episode, 2015)
Grandpa Richie (1 episode, 2016)
Dr. Kids (1 episode, 2016)
Geraldine Peters (1 episode, 2016)
Flossie (1 episode, 2016)
Dr. Reed (1 episode, 2016)
Braden (1 episode, 2016)
Mover (1 episode, 2016)
The New Chief (1 episode, 2008)
Dizzy Boy (1 episode, 2008)
Taxi Driver (1 episode, 2011)
Grimace (1 episode, 2011)
Dr. Bloomfield (1 episode, 2012)
Richard Jarvis (1 episode, 2012)
Cyrus Mittleman (1 episode, 2012)
Kid Patient (1 episode, 2012)
Button Boy (1 episode, 2012)
Levon Bainter (1 episode, 2013)
Weird Al Yankovic (1 episode, 2013)
Party Host (1 episode, 2013)
David (1 episode, 2013)
Gene (1 episode, 2015)
Donald (1 episode, 2015)
Pop (1 episode, 2015)
Billy (1 episode, 2015)
Mark Matt (1 episode, 2015)
Kip (1 episode, 2015)
Grandpa Ben (1 episode, 2016)
Imam Islam (1 episode, 2016)
Hannibal Buress (1 episode, 2016)
Mother (1 episode, 2016)
Sarah (1 episode, 2016)
Erica (1 episode, 2016)
Blake's Mom (1 episode, 2008)
Appalled Mom (1 episode, 2008)
Lovely Nurse (1 episode, 2010)
Senator Throman (1 episode, 2010)
Park (1 episode, 2010)
Nurse (1 episode, 2010)
Death (1 episode, 2011)
Kyle Bradway (1 episode, 2011)
Porno Nurse (1 episode, 2011)
Sam (1 episode, 2011)
Dr. Joseph Mengele (1 episode, 2012)
Vito (1 episode, 2012)
Dancer / Male Nurse (1 episode, 2012)
Carrie (1 episode, 2012)
Glenn Richard (1 episode, 2012)
Stacy's Kid (1 episode, 2012)
Male Set PA (1 episode, 2012)
Preston (1 episode, 2012)
Denise (1 episode, 2013)
Self (1 episode, 2013)
NATO Chairman (1 episode, 2013)
Kid (1 episode, 2013)
Mailman (1 episode, 2013)
Victim (1 episode, 2013)
Duenna (1 episode, 2015)
Dr. Sunnit Bharta (1 episode, 2015)
Rhonda (1 episode, 2015)
Carol Torton (1 episode, 2015)
Asher (1 episode, 2015)
Dean Koontz (1 episode, 2015)
Tom Arnold (1 episode, 2016)
Governor Jasper Ruth (1 episode, 2016)
Sally (1 episode, 2016)
Janet (1 episode, 2016)
Mailman (1 episode, 2016)
Sandy (1 episode, 2016)
Studio Head (1 episode, 2016)
Patient (1 episode, 2016)
Dr. Antonio Zavala (1 episode, 2008)
Georgene Lefkowits (1 episode, 2010)
Justin (1 episode, 2010)
Kelly (1 episode, 2011)
Lisa Edelstein (1 episode, 2011)
Matthew Perry (1 episode, 2011)
Hank Maestro (1 episode, 2011)
Britches (1 episode, 2011)
Peter Principato (1 episode, 2011)
Pat (1 episode, 2011)
Narrator (1 episode, 2011)
Angry Mother (1 episode, 2011)
Porno Patient (1 episode, 2011)
Desperate Dad (1 episode, 2011)
Kid's Mom (1 episode, 2012)
The Duchess (1 episode, 2012)
Burly Tattooed Man (1 episode, 2012)
Tough Girl (1 episode, 2012)
Josh Graven (1 episode, 2012)
Young Chief (Age 10) (1 episode, 2012)
Marvin (1 episode, 2013)
Dr. Santa Claus (1 episode, 2013)
Hypnotist (1 episode, 2013)
Marnie Weiss (1 episode, 2013)
Assistant Director (1 episode, 2013)
Gojira (1 episode, 2013)
Matthew Hauser (1 episode, 2015)
Old Man (1 episode, 2015)
Rich Man (1 episode, 2015)
Linda (1 episode, 2016)
Paula Reilly (1 episode, 2016)
Chuggy Simple (1 episode, 2016)
Dick Cavett (1 episode, 2016)
Grandma Richie (1 episode, 2016)
Old Woman (1 episode, 2016)
Todd the Vagrant (1 episode, 2016)
Biker (1 episode, 2016)
Dancer (1 episode, 2016)
Mrs. Throman (1 episode, 2010)
Captain Stern (1 episode, 2010)
Morgan (1 episode, 2010)
Shady Mobster (1 episode, 2010)
Sultan's Aide (1 episode, 2010)
Jesse (1 episode, 2011)
Famous Person (1 episode, 2011)
Mole Man (1 episode, 2011)
Roman DeBeers (1 episode, 2011)
Greg (1 episode, 2011)
Dr. Black (1 episode, 2011)
Reporter 3 (1 episode, 2011)
Dr. Filth (1 episode, 2011)
Lacey Briggs (1 episode, 2012)
Tourist Mom (1 episode, 2012)
Midwife (1 episode, 2012)
Female Set PA (1 episode, 2012)
Young Sal (1 episode, 2012)
Bailiff (1 episode, 2012)
Chet (1 episode, 2012)
Michael (1 episode, 2013)
Future Doctor (1 episode, 2013)
Susan (1 episode, 2013)
Mosura (1 episode, 2013)
Captain Berg (1 episode, 2013)
Trumpet Teacher (1 episode, 2013)
Pepsi Lamarr (1 episode, 2015)
Russian General (1 episode, 2015)
Judge (1 episode, 2015)
Tween Patient (1 episode, 2015)
Jamyang (1 episode, 2016)
Mamma Fiorucci (1 episode, 2016)
Malik (1 episode, 2010)
Mom of the Kid (1 episode, 2010)
Blake's TV Son (1 episode, 2010)
Cool German Kid (1 episode, 2010)
Seth (1 episode, 2011)
Nurse (1 episode, 2011)
Screaming Child (1 episode, 2011)
Dookie (1 episode, 2012)
Lamaze Teacher (1 episode, 2012)
Glenn's Mom (1 episode, 2012)
Flight Attendant 1 (1 episode, 2012)
Samantha (1 episode, 2012)
Jake (1 episode, 2012)
Rosa (1 episode, 2012)
Young Kid (1 episode, 2012)
Bartender (1 episode, 2012)
Doctor Gnu (1 episode, 2012)
Other Tattoo Artist (1 episode, 2012)
John Tandy (1 episode, 2013)
Chase McKeever (1 episode, 2013)
Betty (1 episode, 2013)
Capt. Beach-House (1 episode, 2013)
Older Woman (1 episode, 2013)
Audience Guy #2 (1 episode, 2013)
Willy (1 episode, 2013)
Lakme (1 episode, 2013)
Ron Pippin (1 episode, 2015)
Leonard Hillman (1 episode, 2015)
Worker (1 episode, 2015)
Cyborg (1 episode, 2015)
Padme (1 episode, 2015)
Khan (1 episode, 2016)
Nurse (1 episode, 2016)
Hubert McGraw (1 episode, 2010)
Daffy Giraffy (1 episode, 2010)
Sultan Abdul Aziz (1 episode, 2010)
Jason Sklar (1 episode, 2010)
Freckles (1 episode, 2010)
School Teacher (1 episode, 2010)
Young Sy (1 episode, 2010)
Spiros (1 episode, 2011)
Pharmacist (1 episode, 2011)
Randall (1 episode, 2011)
Arthur Childrens (1 episode, 2011)
Resident (1 episode, 2011)
Girl (1 episode, 2011)
Mother (1 episode, 2012)
Frankie (1 episode, 2012)
Mexican Boy (1 episode, 2012)
Another Mom (1 episode, 2012)
Script Supervisor (1 episode, 2012)
Parent (1 episode, 2012)
Ballard (1 episode, 2013)
Denizen Stoop (1 episode, 2013)
Bad Guy #1 (1 episode, 2013)
Steve Perry (1 episode, 2013)
Shari (1 episode, 2013)
Sumo Wrestler (1 episode, 2013)
Female Warrior (1 episode, 2015)
African Diplomat (1 episode, 2015)
Nidhi (1 episode, 2015)
Cop (1 episode, 2016)
Joanne (1 episode, 2016)
Nurse Allison (1 episode, 2008)
Jeffrey Ross (1 episode, 2010)
Gang Boss (1 episode, 2010)
Elderly Nurse (1 episode, 2010)
Randy Sklar (1 episode, 2010)
Gladys (1 episode, 2010)
Daniel Throman (1 episode, 2010)
Schmoitle (1 episode, 2010)
70's Dude (1 episode, 2011)
Female Intern (1 episode, 2011)
Robert (1 episode, 2011)
Black Blake (1 episode, 2011)
Kid (1 episode, 2011)
Jessica Meetcher (1 episode, 2012)
Trevor (1 episode, 2012)
Wife (1 episode, 2012)
Head Juror (1 episode, 2012)
Scared Kid (1 episode, 2012)
Kid's Parent (1 episode, 2012)
Audience Lady (1 episode, 2013)
Dylan (1 episode, 2013)
Japanese Detective (1 episode, 2013)
Tooter Daniels (1 episode, 2015)
Grandma Shirley (1 episode, 2016)
X (1 episode, 2016)
Lt. D'Ghor Koru (1 episode, 2010)
Glenn's Mom (1 episode, 2010)
Officer (1 episode, 2010)
Cop (1 episode, 2010)
Dr. Brock Stryker (1 episode, 2011)
Black Administrator (1 episode, 2011)
Mr. Dunn (1 episode, 2011)
Orphan (1 episode, 2011)
Warden (1 episode, 2011)
Boy (1 episode, 2011)
Micha Spiegelman (1 episode, 2011)
Dancer #2 (1 episode, 2011)
Stacy (1 episode, 2012)
Kevin Pollak (1 episode, 2012)
Judge Lester Harrison (1 episode, 2012)
Nurse Dorothy (1 episode, 2012)
Dr. Random (1 episode, 2012)
Father (1 episode, 2012)
Jasper-Pants (1 episode, 2013)
Captain (1 episode, 2013)
Gunman (1 episode, 2013)
Mallika (1 episode, 2013)
First Lady (1 episode, 2015)
Grandma Betty (1 episode, 2016)
Noah (1 episode, 2010)
Hermaphrodite (1 episode, 2010)
Butler (1 episode, 2011)
Reporter 2 (1 episode, 2011)
Delivery Woman (1 episode, 2011)
Transvestite (1 episode, 2011)
Logan's Dad (1 episode, 2011)
Dancer #1 (1 episode, 2011)
Italian (1 episode, 2012)
Mom (1 episode, 2012)
Businessman (1 episode, 2012)
Writer #1 (1 episode, 2012)
Pinata Kid (1 episode, 2012)
Chuck Engall (1 episode, 2013)
Audience Guy #1 (1 episode, 2013)
Dev (1 episode, 2015)
Doctor (1 episode, 2016)
Olga (1 episode, 2010)
Raye LePlante (1 episode, 2010)
Boss (1 episode, 2010)
Distraught Woman (1 episode, 2011)
Doctor (1 episode, 2011)
LA Laker (1 episode, 2011)
Mother (1 episode, 2011)
Reporter 1 (1 episode, 2011)
Dancer #4 (1 episode, 2011)
Man (1 episode, 2012)
Tourist (1 episode, 2012)
Cheryl Tiegs (1 episode, 2015)
Parent (1 episode, 2010)
Breakdancer (1 episode, 2010)
Ajuku Girls / Blake's Daughter (1 episode, 2010)
Little Ernie Hudson (1 episode, 2010)
Child #1 (1 episode, 2011)
Young Child (1 episode, 2011)
CPR Kid (1 episode, 2011)
Nurse Tanya (1 episode, 2011)
Scott (1 episode, 2011)
Kenny (1 episode, 2012)
Nidhi (1 episode, 2010)
Black & White Nurse (1 episode, 2010)
Patient (1 episode, 2010)
Voice Over Coach (1 episode, 2011)
Father (1 episode, 2011)
Dirty Randy (1 episode, 2011)
Michael Caine (1 episode, 2012)
Elliot (1 episode, 2012)
Waitress (1 episode, 2015)
Trustafarian (1 episode, 2010)
Indian Blake (1 episode, 2010)
White Man (1 episode, 2011)
Girl 1 (1 episode, 2011)
Little Sick Kid (1 episode, 2011)
Indian Chief (1 episode, 2010)
Mom (1 episode, 2011)
Girl 2 (1 episode, 2011)
Kid (1 episode, 2010)
Indian Cat (1 episode, 2010)
Dancer (1 episode, 2010)
Daughter (1 episode, 2010)
Dr. Owen's Secret Baby (1 episode, 2011)
Security Guard (1 episode, 2012)
General Gates (1 episode, 2013)
Strong Man (1 episode, 2013)
Indian Chief (1 episode, 2013)
Ballerina (1 episode, 2013)
P.A. (1 episode, 2013)
Melanie (1 episode, 2015)
Melicia Farhad (1 episode, 2015)
Wu Lee (1 episode, 2015)
(1 episode, 2016)
Boy Blake (unknown episodes)
Supply Closet Orderly (unknown episodes)
Jackpot Doctor (unknown episodes)
Dr. Izzy (uncredited) (3 episodes, 2011)
Girl in the Wheelchair / Sick Girl in Crèches (uncredited) (2 episodes, 2010)
Handsome Janitor (uncredited) (1 episode, 2008)
Bartender (uncredited) (1 episode, 2008)
Girl with Broken Arm (uncredited) (1 episode, 2010)
Chewbacca (uncredited) (1 episode, 2010)
Doctor (uncredited) (1 episode, 2010)
1940's Girl in Wheelchair (uncredited) (1 episode, 2010)
Swedish Glenn (uncredited) (1 episode, 2011)
Doctor (uncredited) (1 episode, 2011)
Mean Nurse (uncredited) (1 episode, 2011)
Angry Parent (uncredited) (1 episode, 2011)
Choking Girl (uncredited) (1 episode, 2012)
Tourist Dad (uncredited) (1 episode, 2012)
Soldier (uncredited) (1 episode, 2012)
Yoko Ono (uncredited) (1 episode, 2012)
Rosa's Son (uncredited) (1 episode, 2012)
Red Coat (uncredited) (1 episode, 2013)
Drummer (uncredited) (1 episode, 2013)
Doctor (uncredited) (1 episode, 2016)