Xtro 3: Watch the Skies

“From beyond imagination... from beyond the earth itself... Xtro waits.”

A squad of Marines is dropped onto a deserted island with orders to defuse a set of bombs. Lt. Martin Kirn (Sal Landi) leads them under Captain Fetterman (Andrew Divoff), until an alien creature starts picking them off. Harry Bromley Davenport sets Kirn against Fetterman as much as the creature, two officers who never settle which of them gives the orders.