It’s not about Fleetwood Mac. “The whole cast has been having these really intense meetings with each other,” Brill said, “And we have never felt more like a band.” Brill, who’s known to television audiences as Midge’s brother Noah in "The Marvelous Mrs. Maisel," Scott Brown on "The OA" and a viperish, self-loathing Roy Cohn on Showtime’s "Fellow Travelers," also …