The FBI/DEA

FBI Special Agent Dale Bartholomew Cooper	Kyle MacLachlan
FBI Special Agent Windom Earle	Kenneth Welsh
FBI Special Agent Roger Hardy	Clarence Williams III
FBI Special Agent Phillip Jeffries	David Bowie
FBI Special Agent San Stanley	Kiefer Sutherland
FBI Special Agent Chet Desmond	Chris Isaak
FBI Special Agent Albert Rosenfield	Miguel Ferrer
DEA Agent Dennis/Denise Bryson	David Duchovny
FBI Regional Chief Gordon Cole	David Lynch

Twin Peaks Sheriff's Station

Sheriff Harry S. Truman	Michael Ontkean
Deputy Tommy "The Hawk" Hill	Michael Horse
Deputy Andy Brennan	Harry Goaz
Lucy Moran	Kimmy Robertson

The Packard Sawmill

Jocelyn (Josie) Packard	Joan Chen
Andrew Packard	Dan O'Herlihy
Catherine Packard Martell	Piper Laurie
Pete Martell	Jack Nance

Hong Kong Connection

Thomas Eckhardt	David Warner
Jonathan Kumagai	Mak Takano
Jones	Brenda Strong

The Horne Family

Audrey Horne	Sherilyn Fenn
Benjamin Horne	Richard Beymer
Sylvia Horne	Jan D'Arcy
Johnny Horne	Robert Davenport / Robert Bauer (1)
Jerry Horne	David Patrick Kelly

The Palmer Family

Laura Palmer	Sheryl Lee
Leland Palmer	Ray Wise
Sarah Palmer	Grace Zabriske
Madeleine Ferguson	Sheryl Lee

The Hayward Family

Donna Marie Hayward	Lara Flynn Boyle / Moira Kelly (2)
Eileen Hayward	Mary Jo Deschanel
Dr. William Hayward	Warren Frost
Harriet Hayward	Jessica Wallenfels
Gersten Hayward	Alicia Witt

The Briggs Family

Bobby Briggs	Dana Ashbrook
Major Garland Briggs	Don Davis
Elizabeth Briggs	Charlotte Stewart

The Hurley Family

James Hurley	James Marshall
Ed Hurley	Everett McGill
Nadine Butler Hurley	Wendy Robie

The Pulaski Family

Ronette Pulaski	Phoebe Augustine
Janek Pulaski	Rick Tutor / Alan Ogle (1)
Maria Suburbis Pulaski	Roberta Maguire / Michele Milantoni (1)

The Jennings Family

Norma Jennings	Peggy Lipton
Hank Jennings	Chris Mulkey
Annie Blackburne	Heather Graham
Vivian Niles	Jane Greer
Ernie "The Professor" Niles	James Booth

The Johnsons

Shelly Johnson	Madchen Amick
Leo Johnson	Eric Da Re

The Milford Family

Douglas "Dougie" Milford	Tony Jay
Lana Budding Milford	Robyn Lively
Mayor Dwayne Milford	John Boylan

The Marshs

Evelyn Marsh	Annette McCarthy
Jeffery Marsh	John Apicella
Malcolm Sloan	Nicholas Love

Other Twin Peaks Residents

Dr. Lawrence Jacoby	Russ Tamblyn
Margaret Lanterman	Catherine E. Coulson
Carl Rodd	Harry Dean Stanton
John Justice Wheeler	Billy Zane
Cliff Howard	Rick Aiello
Harold Smith	Lenny Von Dohlen
Real Mrs. Tremond (Harold's neighbor)	Mae Williams

One Eyed Jack's

Jean Renault	Michael Parks
Jacques Renault	Walter Olkewicz
Bernard Renault	Clay Wilcox
Blackie O'Reilly	Victoria Catlin
Nancy O'Reilly	Gaylyn Gorg
RCMP Officer Preston King	Gavan O'Herlihy

The Other Side

"Killer Bob"	Frank Silva
Little Man From Another Place	Michael J. Anderson
The Giant	Carel Struycken
Phillip Michael Gerard / "Mike"	Al Strobel
"Sycamore Trees" Singer	James V. Scott
Pierre Tremond (Boy Magician)	Austin Jack Lynch
Mrs. Tremond (Pierre's grandmother)	Frances Bay

The Court System

Judge Clinton Sternwood	Royal Dano
Sid (Judge Sternwood's law clerk)	Claire Stansfield
District Attorney Daryl Lodwick	Ritch Brinkley
Wilson Mooney (Hank's lawyer)	Jed Mills
Mr. Racine (Leo's lawyer)	Van Dyke Parks

Twin Peaks High School

Principal George Wolchezk	Troy Evans
Vice-Principal	Don Calfa
P.E. Teacher/Cheerleading Coach	Lisa Cloud
Wrestling Coach	Ron Taylor
Mike "Snake" Nelson	Gary Hershberger

Horne's Department Store Staff

Emory Battis	Don Amendolia
Richard "Dick" Tremayne	Ian Buchanan
Jenny (perfume counter girl)	Lisa Ann Cabasa

Great Northern Hotel Staff

Trudy Chelgren (waitress)	Jill Rogosheske Engels
Louie (desk clerk)	Bellina Logan
Julie (concierge)	Diane Caldwell
Randy St. Croix (concierge)	Ron Blair
Room Service Waiter (Señor Droolcup)	Hank Worden
Samantha (Ben's secretary)	Susan Sundholm

Minor Characters

Teresa Banks	Pamela Gidley
Caroline Powell Earle	Brenda E. Mathers
Gwen (Lucy Moran's sister)	Kathleen Wilhoite
Tim Pinkle	David L. Lander
Reverend Clarence Brocklehurst	Royce D. Applegate
Dell Mibbler	Ed Wright
Colonel Riley	Tony Burton
Irene Littlehorse	Geraldine Keams
Dr. Shelvy	Tawnya Pettiford-Waites
Nicholas "Little Nicky" Needleman	Joshua Harris
Thadilonius "Toad" Barker (RR Diner patron)	Kevin Young
Heidi	Andrea Hays
Joey Paulson (James Hurley's friend)	Brett Vadset
Scotty (Joey Paulson's friend)	Rodney Harvey
Roadhouse Singer	Julee Cruise
TV Reporter	Mark Frost
Louise Dombrowski	Emily Fincher

Pawns

Eric Powell	Craig MacLachlan
Rusty Tomaski	Ted Raimi

Insurance Men

Mr. Neff	Mark Lowenthal
Leo's Insurance Man	Ian Abercrombie

Ghostwood Estate Investors

Einar Thorson	Brian Straub
Heba	Mary Stavin
Sven Jorgensen	Arnie Stenseth
Mr. Tojamura (Catherine)	Fumio Yamaguchi (Piper Laurie) (3)

"Invitation to Love" Cast

Martin Hadley ("Chet")	Lance Davis
Selina Swift ("Jade"/"Emerald")	Erika Anderson
Evan St. Vincent ("Jared Lancaster")	Peter Michael Goetz
Jason Denbo ("Montana")	Rick Giolito

Notes

(1) The first actor listed played the character in the pilot episode (1000), but was replaced by the second actor in all remaining episodes.

(2) The first actor listed played the character in the TV series, but was replaced by the second actor in the film "Twin Peaks: Fire Walk With Me.

(3) Piper Laurie played Tojamura in all scenes, but was credited as 'Fumio Yamaguchi' to hide this fact from viewers. This deception by the producers extended to a fake biography released by Lynch/ Frost Productions to the newspaper USA TODAY. This biography stated, among other things, that Yamaguchi had been in several of Akira Kurasawa's films.