Lupo died Feb. 18 at his home in Florida, according to his sister, Linda Joy Sullivan.
Lupo’s work in TV took off in the late 1970s when he wrote for such series as “Battlestar Galactica,” “Magnum, P.I.,” “B.J. and the Bear” and “The Misadventures of Sheriff Lobo.”
Lupo worked on the Universal Television lot in the same era as Cannell, the prolific showrunner behind “The Rockford Files” and “Baretta.” Lupo wrote several episodes of Cannell’s ABC dramedy “The Greatest American Hero.”
Lupo and Cannell then co-created “The A-Team,” the action-drama with touches of comedy that became a massive hit for NBC in 1983. Cannell, who died in 2010, famously took the bold step of launching his own independent production banner on the back of “A-Team.