Boba Fett is the best bounty hunter in the galaxy. He works for Jabba the Hutt and the Empire. After the Battle of Hoth,Boba Fett was hired by the empire with many other bounty hunters to find the Millenium Falcon. Boba Fett tracked them to Bespin and contacts Imperials and brings Han Solo to Jabba the Hutt on Tatooine (at the end of episode 5). Then Luke comes and rescues Han,Chewbacca,Leia,Lando and the Droids (In the begining of episode 6). While that battle, against Jabba the Hut, Han Solo acidentally knocks Boba Fett into the sarlack (that big snake-like monster in the sand that eats everybody) and kills Boba fett. But I read somewhere (I forgot where) that he comes back and works for the empire and tries to get revenge on Han Solo and Luke SkyWalker.