“Mannequin vs. Mannequin” Legend has it there’s a murder-happy mannequin on the loose! Michael McDonald reprises his role as the evil mannequin, and the only way to bring him down is with a good mannequin (played by Neil Patrick Harris). Check out this “killer” sketch in an all-new episode of MADtv airing Saturday, April 19 (11:00 PM – Midnight ET/PT) on FOX.