4-LOM was an ambitious LOM-series protocol droid who overrode his programming and became a galactic thief and later a bounty hunter. He often worked together with Gand finds man Zuckuss. Following the Battle of Hoth, both 4-LOM and Zuckuss were hired by the Sith Lord known as Darth Vader to capture Han Solo, captain of the Millennium Falcon and hero of the Alliance to Restore the Republic. However, the bounty on the smuggler's head was instead claimed by the infamous Boba Fett.