MacGyver is an American action-adventure television series that aired on ABC from 1983 to 1993, for a total of ten seasons. The primary protagonist, Angus MacGyver (Richard Dean Anderson) was formerly an intelligence agent in the mid/late 1970s and an explosives disposal technician in Sumatra in the late 1960s, now residing in Los Angeles. MacGyver primarily works for his close friend and boss Peter Thornton (Dana Elcar), head of the fictional Department of External Services (DXS) in the first season and projects/executive director of the civilian Phoenix Foundation for the remainder of the series, as a problem-solver, using his considerable skill, intelligence, and resulting crazy contraptions to fight crime around the world.
- Richard Dean Anderson as Angus MacGyver (Seasons 1 to 10) – Most often referred to by his last name (as his first name wasn't revealed until the seventh season), or "Mack", MacGyver is an extremely intelligent and equally resourceful person. He often carries around or has his ubiquitous duct tape on hand to help built his contraptions.
- Dana Elcar as Peter "Pete" Thornton (Seasons 1 to 10) – MacGyver's boss and best friend, who sometimes ends up having to get him out of a sticky situation, or more often, vice versa.
- Bruce McGill as Jack Dalton (Seasons 2 to 10) – One of MacGyver's oldest friends, Jack can be a habitual liar when prompted; he often drags MacGyver (and sometimes Pete) into a get-rich quick scheme, almost always ending in semi-comical disaster.
- Michael Des Barres as Murdoc (Seasons 2 to 10) – Another old 'acquaintance' of MacGyver's, Murdoc is a professional assassin with a vendetta against MacGyver, who constantly thwarts his plans. Murdoc can be best described as a 'cockroach', as any time MacGyver and Pete think he's dead, he shows up again at some point, disfigured from an injury that would kill a normal person (e.g. barely escaping an exploding truck, seemingly getting crushed in a building demolition, or even falling from a 500-foot cliff).