John de Lancie is the American actor who played the air-traffic controller Donald Margolis on Breaking Bad, father of Jane Margolis. Lancie is perhaps best known for his role as a member of an omnipotent collective called "the Q", on Star Trek: The Next Generation, Star Trek: Voyager, and Star Trek: Deep Space Nine. His character, who is referred to as the individual "Q", is known to be a prankster, and uses his omnipotent powers to throw the universe into disarray.