Leprechaun 4

A group of mercenaries commanded by Metal Head, whose skull was partially rebuilt in metal, is hired by the insane scientist Dr. Mittenhand to destroy an alien (Leprechaun). He also sends the biologist Dr. Tina Reeves to join the team to study the remains of the "alien". Metal Head assigns Sgt. Books to protect her. Meanwhile, the Leprechaun is on a planet after abducting the Dominian Princess Zarina, expecting to marry her and become a king. He uses his gold to convince the ambitious princess that he is a catch. The soldiers arrive on the planet, blow him up and bring his remains on board, together with his gold and the wounded Princess Zarina. Out of the blue, Leprechaun returns through the sex of the soldier Kowalski and starts a crime spree on board looking for his gold.