"O C'mon All Ye Faithful", titled onscreen as "A Derren Brown Christmas", is the first special of the thirty-sixth season of the American animated television series The Simpsons, comprising the 778th and 779th episodes overall. The episodes were the first to be released exclusively on the streaming service Disney+ and were released on December 17, 2024, between the ninth and tenth broadcast episodes on Fox. The episodes were written by Carolyn Omine and directed by Debbie Bruce Mahan and Matthew Faughnan.