When Farrell is tying up the Skipper, Gilligan and the Professor, the Skipper's hat falls flat on his bunk and Farrell walks out. In the next shot - a little later and the Skipper is still tied up - the hat is back on his head.
Mr. Howell offers Farrell a check for a hundred thousand dollars, but Farrell thinks it's for ten thousand dollars. A close-up of the check, however, reveals that they're both wrong. It's for a million dollars.
As Jackson Farrell is getting ready to leave, the Professor addresses him as "Mr. Jackson" (rather than Mr. Farrell).