Magnum, P.I. (1980)

T.C. makes a late-night flight to land on a tanker, but on the journey back he is cornered arrested by the Coast Guard for transporting drugs. Magnum and Rick are certain of their friend's innocence, but are bemused when he intends to accept the charges and refuses their help. Magnum investigates, to find that T.C. trip to the tanker was to collect and bring home a man who once saved T.C.'s life in Vietnam, a deserter who is now a supposedly reformed drug addict, who was calling in an old debt to be flown back in to U.S. territory...