Mark Margolis, the prolific actor with a simmering air of menace as the fearsome former drug lord Hector Salamanca in “Breaking Bad,” died August 3 in Manhattan. He was 83.

Mr. Margolis notched more than 160 credits in movies and on television, but no role made him as instantly recognizable as Hector in the critically-acclaimed series, which ran for five seasons on AMC, starting in 2008, and in its prequel, “Better Call Saul,” which ran for six seasons starting in 2015.

In “Breaking Bad,” he spoke no words, but communicated by means of a wheelchair bell. “I tell people I’m the most famous bell ringer since Quasimodo,” he said.