When Dr. Milhouse retrieves Fred's gun and tries to calm himself, a crew person is clearly visible behind the luggage area. He is wearing white shorts and white tennis shoes.
In the cockpit when the pilot sees the queen for the first time, you can see the legs of the man in the suit in the flashes for a second. Also, when the queen is at the bar, you can see a crewmember holding the tail on a stick.