William "Bill" Armstrong (born June 6, 1954) is a Canadian-born British actor, screenwriter and activist who played Lydecker in the extended Special Edition of the 1986 film Aliens. Aliens was Armstrong's first film role. Other notable films Armstrong has appeared in include Derailed (2005), A Sound of Thunder (2005), La Vie en Rose (2007), 1408 (2007) and The Dark Knight (2008). Aside from his work in film, Armstrong has had an extensive career in television and theater. He is perhaps best-known for his roles as eccentric bank investor Max Lubin in the drama series Capital City (1989-1990) and forensic pathologist Dr. Trevor Stewart in the police procedural series Silent Witness (1996-1998).

As a screenwriter he has written many episodes of the medical soap opera Doctors (2006-) and has since become a core writer for the show; his episode Unfinished Business was nominated for Best Single Episode at the British Soap Awards. He also wrote all five episodes in the first season of the comedy-drama series The Indian Doctor (2010).

In addition, Armstrong has had a career in activism; he is the former Chair of the Writers' Guild of Great Britain (WGGB) TV Committee. The organisation is dedicated to negotiating better pay and working conditions for writers.

Awards and Nominations[]

Year Work Notes
2015 Doctors - Unfinished Business British Soap Award for Best Single Episode (Nominee)


Year Title Notes
1986 Aliens[1]
The American Way With Al Matthews
1987 Hope and Glory
1996 Lazarus
2001 The Fourth Angel
The Point Men
2004 Out of Season
2005 Derailed
7 Seconds With Deobia Oparei
A Sound of Thunder
2006 The Wind That Shakes the Barely
2007 Le Vie en Rose With Jan Pavel Filipenský
1408 With Eric Meyers
2008 The Brøken
The Dark Knight With Vincenzo Nicoli



  1. Armstrong's appearance in Aliens was cut from the theatrical release, but later reinstated in the extended Special Edition