The Skipper places the lightning rod next to Gilligan, but after Gilligan wakes up the position of the lightning rod has changed.
Meteorites glow from intense frictional heat, not from "picking up all sorts of strange rays" as the Professor claims. He also incorrectly mimics the others by calling it a meteor instead of the correct meteorite.
Disintegrating a radioactive meteorite will not eliminate the radiation.
The impact of a meteor that size would have completely destroyed the island.
Despite the Professor's contradictory claim, cosmic rays are a form of radiation.
After waking up, Gilligan tries to get the lightning rod to the meteor, but as he's holding it, it attracts a lightning bolt. Gilligan would've been electrocuted, which would've likely killed him, or at bare minimum for comical purposes, would've had him covered in soot. Neither of which happens.
Gilligan and the Skipper use sticks to move one of the newly lead-lined shirts, presumably because it's too hot to touch. It accidentally falls over behind the other shirts and the professor picks it up with his bare hands.
It is unclear how Gilligan, Skipper and the Professor were able to paint their faces with molten lead.
If the castaways had actually celebrated their 50th anniversary on the island, the Howells would not have still been alive.
When old Gilligan helps old Skipper up from the hammock, there appears to be a bit of flatulence from one, or possibly both.
Gilligan wakes up from hearing and feeling the lightning and wind from the electrical storm, grabs the lightning rod and gets it to the meteorite so it can be destroyed, yet the Skipper and the Professor are working in the hut on who knows what, completely oblivious that the storm has arrived, yet don't bother to check on Gilligan or grab the lightning rod so the meteor can be destroyed.
The Professor, Skipper and Gilligan coat their clothing with lead to protect themselves from radioactivity. The Professor suggests that they put their shoes on first while Gilligan puts his pants on first. Who is the smart one???