 Originally there were going to be two huge alien spaceships looming  over Earth: an Arquillian ship and a Baltian ship, with  representatives of both species staking claim of the galaxy. Mr.  Rosenberg (the "little dude in the big dudes head") was a Baltian  (confirmed by the novelization of the film), while the tall alien  (Carel Struycken (qv)) he met at the restaurant was an Arquillian  (and is so listed in the end credits). After some choice editing and  rewriting, Rosenberg became an Arquillian.