The Beast From the Belly of a Boeing - S1-E13
Continuity mistake: The Boeing 747 in this episode is supposed to belong to Beller Air, however exterior shots show the TWA Airlines logo.
The Beast From the Belly of a Boeing - S1-E13
Factual error: The hijacked plane is a Boeing 747 where the cockpit is on the upper deck. When the passengers are loading on the plane, the cockpit is shown on the lower deck.
The Beast From the Belly of a Boeing - S1-E13
Continuity mistake: As Hannibal, made up as Beller, walks up the steps, Jackson looks at Beller's picture on a magazine. A moment later, the magazine's back cover is facing him.
Answer: Several times, Face would pose as a doctor to get Murdock out of the Mental Hospital. How easy would it have been to convince airport officials that he was a doctor taking a sedated patient on board? Or simply tell them, this man is afraid of flying, so he had to be sedated. They could say, "Believe me, you don't want this man to be awake."