Jeremy Davies as Charles Manson

Clea DuVall as Linda Kasabian

Allison Smith as Patricia 'Katie' Krenwinkle

Mary Lynn Rajskub as Lynette 'Squeaky' Fromme

Marguerite Moreau as Susan 'Sadie' Atkins

Eric Dane as Charles "Tex" Watson

Michael Weston as Bobby Beausoleil

Hal Ozsan as Joey Dimarco

Rick Gomez as Milio

Robert Joy as Detective Morrisy

Graham Beckel as Jerry

Chris Ellis as Sgt. Whiteley

Isabella Hofmann as Rosemary LaBianca

Robert Costanzo as Leno LaBianca

Yvonne Delarosa as Catherine 'Gypsy' Share

Cheselka Leigh as Kathryn 'Kitty' Lutesinger

John Pleshette as Mr. Krenwinkle

Whitney Dylan as Sharon Tate

Susan Ruttan as Mrs. Kasabian

Bruno Kirby as Vincent Bugliosi

Catherine Wadkins as Leslie Van Houten

Kai Lennox as Steve 'Clem' Grogan

Hopwood DePree as Paul Watkins

Nick Jameson as Gary Fleishman

Kirk B.R. Woller as Detective Kleinman

Robert Pine as Judge Keene

Wolf Muser as Chief Davis

Marek Probosz as Roman Polanski

Elizabeth Ann Bennett as Abigail Folger

George Tasudis as Voytek Frykowski

Patrick Fabian as Jay Sebring

Jaimz Woolvett as Gary Hinman

François Chau as Dr. Noguchi

Jeffrey Johnson as Terry Melcher

Chris Jacobs as Dennis Wilson

Chad Morgan as Suzanne LaBianca

Jeanette O'Connor as Ronni

Kim Strauss as Sgt. William Gleason

Gwen McGee as Winifred Chapman

P.J. Byrne as Man With Thick Glasses

Mark Thompson as L.A. Newscaster

Patricia del Rio as Local TV Reporter

John Lacy as CHP Officer

Abner Genece as Jail Guard

Danielle DiCerbo as Bernardine Dohrn