Late Night with Seth Meyers Season 5 John Mulaney, Rep. Seth Moulton, Matty Matheson Season 5, episode 66 John Mulaney, Rep. Seth Moulton, Matty Matheson February 8, 2018 45 min Seth welcomes John Mulaney, Congressman Seth Moulton and Matty Matheson. Previous episode James Spader, Whitney Cummings, Malcolm Jenkins Next episode Holly Hunter, Jason Jones, the Broadway cast of “Once On This Island”