||Voice: Randy Thom (The Empire Strikes Back), Denny Delk (Revenge of the Sith)
||Medical droid in The Empire Strikes Back that tends to Luke Skywalker in the bacta tank after the Wampa attack on Hoth, and replaces Luke's hand. A 2-1B droid also serves as medical droid to Anakin Skywalker in Revenge of the Sith, and can be seen in the Star Wars Rebels animated series.
||Chris Parsons (The Empire Strikes Back)
||Protocol droid with insectoid features, 4-LOM is among the Bounty Hunters who answer Darth Vader's call to capture the Millennium Falcon in The Empire Strikes Back. In the Legends continuity it is Jabba the Hutt that upgrades 4-LOM's programming, turning him into a full-fledged bounty hunter, and partners him with fellow bounty hunter Zuckuss. Teaming up for many years, 4-LOM and Zuckuss join the Rebel Alliance for a time, even having aspirations of mastering the Force. 4-LOM would lose these aspirations and affiliations after being badly damaged by Boba Fett and having his memory erased, restoring him to a cold calculating bounty hunter. The first 4-LOM action figure was misidentified as "Zuckuss" in Kenner's original Star Wars action figure line.
||Torture droid working for Jabba the Hutt in Return of the Jedi. A Kenner action figure was created for this droid during their original Return of the Jedi line.
||Voice: Dee Bradley Baker (The Clone Wars)
||Deformed clone trooper who helps the Domino Squad in the Clone Wars. He is killed during one of the Battles of Kamino.
|0-0-0 (a.k.a. Triple-Zero)
||Protocol droid designed to specialize in etiquette, customs, translation and torture. Structurally similar to C-3PO. An associate of Doctor Aphra and BT-1, the droid is first featured in the Marvel Comics series Star Wars: Darth Vader and is now heavily featured in the ongoing Doctor Aphra series.