The Authority Of The Pilot
Well, this might surprise you, but during a flight, the captain has a lot of authority. Being the ultimate decision-maker on the plane, the captain decides where the plane goes, commands the crew, handles emergencies, and deals with troublesome passengers.
While the captain can’t place people under arrest, despite what some urban legends might claim, it is within the captain’s authority to place people in handcuffs or restraints if they deem that person a threat to the safety of the flight. In addition, much like a sea captain, a pilot can also take a dying passenger’s final will and testament if need be.