Peter: Oh no, foot prints! Someone else is on this island.
Micky: Oh don't worry, those are ours, we don't have a larger set so we had to use the same one twice.
When Davy is telling Mike and Peter that Otto and Sigmund are trying to kill Bettina, the sandwich Mike has switches from his left hand to his right hand in a split second.
The guy who Micky speaks to at the party is in fact James Frawley (the director of the episode).