Early in the episode, when Magnum is driving in to a cemetery, the sky is overcast and the roads are wet. When he pulls up to where he has a meeting, it's nearly cloudless, sunny, and the roads are dry.
TC's MD500 changes from N1095A (with thin skids) at times and then to N58428 (with covered skids).
The doors on TC's chopper are missing when it takes off and lands but are installed in the (likely stock) shot where it is flying across the water.
Magnum is waiting for TC to return with the helicopter. TC, upon returning, is disappointed to see Magnum waiting for him and rather than land, hovers some 30 feet or so off the ground. As he hovers TC carries on a conversation with Magnum, an impossibility due to the roar of the engine. In that situation the helicopter is producing quite a bit of power and therefore a lot of noise. So much so that even yelling as loud as possible neither party could hear the other, and probably not even themselves.
Prior to boarding the chopper, Taylor takes his gun out of his bag and puts it in his jacket to hide it from T.C. It makes no sense for him to do this, since he could have retrieved his gun from the bag after T.C. dropped him off or while he was cutting an opening in the fence.