CZ-4 was a CZ-Series Droid in Jabba's Palace. Thug, one of Jabba The Hutt's Gamorrean Guards, was tinkering with the broken droid down in the Droid Dungeon. By the time Luke Skywalker showed up, CZ-4 was more or less operating, though he was mildly spastic. Thug brought the droid with him on the Sail Barge to serve in the passenger suites, but of course almost all were killed in the Skirmish At Carkoon. CZ-4 was among those exploded.