Continuity mistake: Magnum is about to leave after the slightly awkward introduction to Holly Fox, but she calls him back saying "Maybe there *is* something you could help me with." He sticks his head back into the room, and you can see the glasses' left arm is above the shirt collar. Next shot and it went underneath. (00:13:40)
Continuity mistake: The chopper takes off from Higgie's un-birthday party, looking as usual. It flies over a shore to thwart Holly's plan, and doing so it has the flotation skids from a different chopper's stock footage. It is therefore also missing the birthday banner, that is present again in the finale. (00:45:10)