Uptight, diminutive, mustachioed, often "veddy" (though faux) British and unfailingly urbane, the Texas-born Hillerman created this classic supporting character for 1970s TV. After making an impression as arrogant 1940s radio show detective Simon Brimmer on the NBC revival of "Ellery Queen" (NBC, 1975-76), he further refined the character as the cold fish boss of Bonnie Franklin during the 1976-77 season of the long-running CBS sitcom "One Day at a Time." (He always addressed Franklin as "M S Romano.") Hillerman fared well trading sarcastic quips with Betty White in the superior but short-lived sitcom "The Betty White Show" (CBS, 1977-78). This clever spoof of the TV business revealed his mastery of the deadpan put-down as Hillerman played the estranged ex-husband and director of an Angie Dickinson-like actress in "Undercover Woman," a fictional cop show. He apotheosized the character as the long-suffering major domo Jonathan Higgins in the hugely popular detective comedy-drama "Magnum, P.I." (CBS, 1980-88).