Gunnery Sergeant Burns reports for duty to an American Embassy in the Middle East. However due to the 'enlightened' views of the Ambassador, the marine security detachment he is in charge of is severely restricted in their functions and presence to avoid upsetting the host government. As a result, when terrorists attack the compound, they are able to kidnap hostages and escape with little opposition. Burns ignores the Ambassador's restrictions, and throws the rule books out the window, as he becomes a one man army in an attempt to rescue the hostages, and wipe out the terrorists.

When teenage geniuses Mitch Taylor and Chris Knight, working on an advanced laser project, learn that the military wants to use it as a weapon, they decide to thwart the plan.

Michael Long, an undercover police officer, is shot while investigating a case and left for dead by his assailants. He is rescued by Wilton Knight, a wealthy, dying millionaire and inventor who arranges life-saving surgery, including a new face and a new identity — that of Michael Knight. Michael is then given a special computerized and indestructible car called the Knight Industries Two Thousand (nicknamed KITT), and a mission: apprehend criminals who are beyond the reach of the law. The series depicts Michael's exploits as he and KITT battle the forces of evil on behalf of the Foundation for Law and Government.