Michael Chernus as John Wayne Gacy in 'Devil in Disguise.' Brooke Palmer/PEACOCK Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment Logo text Nearly six full hours into Peacock's Devil in Disguise: John Wayne Gacy, we finally see the eponymous serial killer applying make-up and donning the clown costume that, for many viewers, is inextricably linked to Gacy's murderous reign.