This report comes from the Official Star Wars Site!
Answered by: Steve Sansweet

I've heard that THX-1138 is in every Star Wars movie, but I can't find it in Return of the Jedi. Is it there?

Well, we assumed so. But frankly, we can't find it. And we've asked some of the crew on Jedi, who should know. It might be written small on some model, but as far as an obvious reference, we're stumped. That goes for Episode II too... unless someone is holding back on us for the ultimate Easter egg!