The TC-series protocol droid was a model of protocol droid very similar in appearance to the 3PO unit model of protocol droid. One TC unit designated TC-14 served the Trade Federation onboard the Lucrehulk-class LH-3210 cargo freighter Saak'ak during the Invasion of Naboo. Another TC unit designated TC-70 served the Hutt crime lord Jabba Desilijic Tiure as a translator during the Clone Wars. A TC unit designated TC-326 served in the Grand Army of the Republic during the Clone Wars and was made Archduke Poggle the Lesser's translator following his capture by Republic forces during the Second Battle of Geonosis.
- Star Wars: Episode I The Phantom Menace (First appearance)
- Star Wars: The Clone Wars film
- Star Wars: The Clone Wars – "Downfall of a Droid"
- Star Wars: The Clone Wars – "Brain Invaders"
- Star Wars: The Clone Wars – "Sphere of Influence"
- Star Wars: The Clone Wars – "Evil Plans"
- Star Wars: The Clone Wars – "Hunt for Ziro"
- Star Wars 15: From the Journals of Old Ben Kenobi
- Star Wars: The Clone Wars: The Complete Season Two
- Star Wars: Absolutely Everything You Need to Know (First identified as TC-series protocol droid)
- Star Wars: Absolutely Everything You Need to Know, Updated and Expanded