Lowell was a dim-witted but likable mechanic/handyman who works at the airport and is available to everyone when repairs are needed. He was a "free agent" of sorts, being on the payroll of both Sandpiper and its rival airline Aeromass, as well as anyone else willing to pay him for repairs. He was married to a woman named Bunny with whom he had several children, but they divorced when Lowell learned that Bunny was sleeping around. He lived with Joe and Brian for a time after his divorce from Bunny, when it was revealed that Lowell is a surprisingly talented cook (as well as the guilt of Joe and Brian for destroying his houseboat in an accident). Eventually, Lowell is forced to leave Nantucket and enter the Witness Protection Program after witnessing a murder by the Mafia.