Mark Margolis: Mark Margolis. Actor: Pi. Mark Margolis was an American actor who is well-known for his collaborations with film director Darren Aronofsky, particularly Pi (1998), Requiem for a Dream (2000), Noah (2014), Black Swan (2010), and The Fountain (2006). Margolis also gained notoriety for his portrayal of "Tio" Hector Salamanca in the highly successful crossover series Breaking Bad (2008) and Better Call Saul (2015). He also acted in the hit films...
