 He has had recurring roles on numerous other TV shows, including "The Equalizer", "Quantum Leap", "Oz", "Law & Order", "Crossing Jordan", "Californication", "Breaking Bad", and "Better Call Saul".In January 2015, he portrayed Felix Faust in the "Constantine" episode "Quid Pro Quo".For his role in "Breaking Bad", Margolis received a nomination for a Primetime Emmy Award for Outstanding Guest Actor in a Drama Series.