
Steve Railsback (born November 16, 1945, in Dallas, Texas) is an American theatre, film, and television actor. He is best known for his performances in the films The Stunt Man and Lifeforce, and his portrayal of Charles Manson in the 1976 television mini-series Helter Skelter.
Railsback was a student of Lee Strasberg and the Actors Studio and in the late 1960s and early 1970s spent 10 years working in theatre in New York City. He once said that he found Strasberg extremely difficult to work with.
He made his film debut in The Visitors, directed by Elia Kazan. He portrayed two notorious murderers, appearing as Charles Manson in the 1976 television miniseries Helter Skelter and as Ed Gein in the 2000 film In the Light of the Moon. He also served as executive producer of the latter film.
Other notable roles include the part of Cameron in The Stunt Man with Peter O'Toole, the astronaut Tom Carlsen in Tobe Hooper's Lifeforce, Duane Barry in two episodes of The X-Files, and Joseph Welch in the pilot episode of Supernatural.
In 2008, he appeared in the science fiction/horror movie film Plaguers.

In the Line of Fire
1993 · as CIA Agent David Coppinger (uncredited)

American Pie Presents: The Book of Love
2009 · as Alumnus Guy #5

Lifeforce
1985 · as Col. Tom Carlsen

The Devil's Rejects
2005 · as Sheriff Ken Dwyer

Barb Wire
1996 · as Colonel Pryzer

Save Me
1994 · as Robbins

Helter Skelter
1976 · as Charles Manson

Scissors
1991 · as Alex Morgan / Cole Morgan

Wild in Blue
2014 · as Charlie's Father

Armed and Dangerous
1986 · as The Cowboy

Disturbing Behavior
1998 · as Officer Cox

Turkey Shoot
1982 · as Paul Anders

UnConventional
2004 · as Self

Vanishing Point
1997 · as Sergeant Preston

Storytelling
2001 · as Mr. Kirk

The Stunt Man
1980 · as Cameron

Calendar Girl
1993 · as Eddie Darpinian

The Visitors
1972 · as Mike Nickerson