We may know the human cast of The Mandalorian, but executive producer Jon Favreau is just now starting to reveal the droid members of the upcoming live-action Star Wars series. Details remain under wraps for the Disney+ show, but Favreau continues to appease fans with photos from the set featuring new props and characters — the latest of which is quite a classic callback. Favreau posted a photo of the R5-D4 unit, a droid that first appeared in 1977’s Star Wars: A New Hope.