Mark Margolis (/mɑːrˈɡoʊlɪs/, mar-GOH-liss; November 26, 1939 – August 3, 2023) was an American actor, best known for his portrayal of the character Hector Salamanca in Breaking Bad (2009–2011) and Better Call Saul (2016–2022).

He was also known for playing Alberto "The Shadow" in Scarface (1983), Jimmy in The Equalizer (1985–1989), Mr. Shickadance in Ace Ventura: Pet Detective (1994), Antonio Nappa in Oz (1999–2003), Mr. Morrison in Short Eyes (1977) and the New Priest in Immortals (2011).

[8] Margolis was also noted for his supporting roles in Scarface (1983),[1] Short Eyes (1977),[9] Ace Ventura: Pet Detective (1994), Immortals (2011), and the films of Darren Aronofsky: Pi (1998), Requiem for a Dream (2000), The Fountain (2006), The Wrestler (2008), Black Swan (2010), and Noah (2014).

In addition, he had recurring roles on numerous other TV shows, including The Equalizer, Quantum Leap, Oz, Law & Order, Crossing Jordan, Californication, Breaking Bad,[10] and Better Call Saul.

[11] For his role in Breaking Bad, Margolis received a nomination for a Primetime Emmy Award for Outstanding Guest Actor in a Drama Series.

[7] In the Berkeley Repertory Theater's 2014 season, he appeared as Gus in Tony Kushner's The Intelligent Homosexual's Guide to Capitalism and Socialism with a Key to the Scriptures.