10 Star Wars Mysteries Explained Outside Of The Films

10. How Did C-3PO Get His Red Arm?

The Mystery:

When C-3PO (Anthony Daniels) re-appears in The Force Awakens, he's sporting a distinctive red arm, before eventually getting a replacement at the end of the movie.

However, the replacement arm is never explained in any of the three sequel trilogy films. So, how did Threepio end up with it?

The Answer:

The 2016 one-shot comic "Star Wars: C-3PO" explains that a Resistance mission involving C-3PO and a number of other droids goes spectacularly wrong when they crash-land on the acidic planet Taul.

Threepio ends up having his arm ripped off by a tentacled monster, and the only other surviving droid, a First Order protocol droid named Omri, sacrifices itself by walking out into the acid rain to activate a Resistance distress beacon.

Omri is promptly melted by the acid rain, leaving behind only his arm which has been stripped down to its base red metal colour. As a tribute to his fallen pal, C-3PO picks up the arm and fixes it to himself.