Continuity mistake: Going to school, Frank takes a cigarette off his mom's hand and throws it over the window. On the first angle he takes his head out of the window, but on the next angle his head is inside, as if just the torso had made the movement.
Continuity mistake: When the show 'To tell the truth' starts, the host has his hands apart and raised. A frame later they are flat on the counter and his fingers crossed.
Continuity mistake: When Frank Jr. takes his father to a fancy restaurant, his hair keeps swapping between brushed backwards or with a fringe on the left side.
Continuity mistake: When Frank's parents are meeting with the principal, you can see Frank through the open blinds. When they leave the office the blinds are closed. (00:21:30 - 00:22:25)
Continuity mistake: In the plane, during Carl and Frank's chat on how did Frank pass the law test, the pillow in between swaps positions between angles.
Continuity mistake: When Frank is having lunch with his father and offers him a Cadillac, in some shots Frank's right arm is over the table, but in others he has both arms hanging.
Answer: It lasts several months. The stewardesses were juniors and seniors from the University of Arizona, whom he fake-recruited for a PR project for Pan-Am (they were not supposed to be real stewardesses, but dress like them and be photographed in various European capitols). Frank was frequently being asked where his "crew" was, so he thought it would lend him credibility.