Question: Which American actor is best known for portraying Julian Sark on the ABC television series "Alias?" 

Context paragraphs:
Charlie Carver: Charlie Carver (born Charles Carver Martensen; July 31, 1988) is an American actor.  His best known roles include Porter Scavo on the ABC television series "Desperate Housewives", Ethan on the MTV television series "Teen Wolf", and Scott Frost on the first season of the HBO television series "The Leftovers".  His twin brother Max Carver has frequently portrayed the twin of his characters.

Michael Vartan: Michael S. Vartan (born November 27, 1968) is a French-American actor, best known for his role as Michael Vaughn on the ABC television action drama "Alias" and also known for his role on the TNT medical drama "Hawthorne".

Julian Sark: Julian Sark is a recurring fictional character portrayed by David Anders on the ABC television series "Alias".  The series follows Sydney Bristow, an operative working for an organization called SD-6 which she believes is a covert branch of the Central Intelligence Agency.  However, she learns it is actually a subsidiary of the Alliance of Twelve, a crime syndicate which seeks to make profits from stolen intelligence and artifacts.  Upon learning the truth Sydney offers her services to the CIA as a double agent with the intention of destroying SD-6 from within.

Robert Colbert: Robert Colbert (born June 26, 1931, in Long Beach, California) is an American actor most noted for his leading role portraying Dr. Doug Phillips on the ABC television series "The Time Tunnel" and his two appearances as Brent Maverick, a third Maverick brother in the ABC/Warner Brothers western, "Maverick" starring James Garner, Jack Kelly and Roger Moore.

Kevin Weisman: Kevin Glen Weisman is an American film, television and stage actor.  He has played Marshall Flinkman on the ABC television series "Alias" (2001–2006), Kives on the HBO television series and movie "Hello Ladies" (2013–14), Ray on the CBS television series "Scorpion", and Dr. Maynard on the NBC television series "The Blacklist".  Weisman plays Ned Berring in season one of the David E. Kelley series, "Goliath", streaming on Amazon Video.

Tope Tedela: Temitope Christopher "Tope" Tedela is a Nigerian actor and producer.  He gained recognition for portraying Julian on the television series "Edge of Paradise".  He came into limelight after playing the lead role in the 2013 film, "A Mile from Home", for which he was nominated for Most Promising Actor at the 10th Africa Movie Academy Awards.  He has also received several awards including Africa Magic Viewers Choice Award, Nigeria Entertainment Award, Best of Nollywood Award, Nollywood Movies Award, Golden Icons Academy Movie Award and Express Star Award for his role in the film.

Richard Long (actor): Richard Long (December 17, 1927 – December 21, 1974) was an American actor best known for his leading roles in three ABC television series, including "The Big Valley," "Nanny and the Professor," and "Bourbon Street Beat".  He was also a series regular on ABC's "77 Sunset Strip" from 1960 to 1962.

David Anders: David Anders Holt (born March 11, 1981), known professionally as David Anders, is an American television and stage actor.  He is best known for his roles as Julian Sark on "Alias", as Adam Monroe on "Heroes", as John Gilbert in the TV series "The Vampire Diaries", as Victor Frankenstein/Dr. Whale on ABC's "Once Upon a Time", and as Blaine "DeBeers" McDonough on "iZombie".  Although Anders is American, a few of his roles have required him to use a British Home counties accent.

Ben Murphy: Benjamin Edward Murphy (born Benjamin Edward Castleberry Jr., March 6, 1942) is an American actor.  He is best-known for his role as Kid Curry in the ABC television series "Alias Smith and Jones".

Angie Bolen: Angela de Luca, known in the series by the alias Angie Bolen, is a fictional character played by Drea de Matteo on the ABC television series "Desperate Housewives".  The character was created by television producer and screenwriter Marc Cherry and appeared throughout the series' sixth season from September 27, 2009 to May 16, 2010.  Cherry describes Angie as a "loving but tough Italian woman."  Her gritty and blunt demeanor contrasts from the domesticated leading characters.

Supporting paragraphs: Julian Sark David Anders
Answer: David Anders Holt