 In 1961, Muir joined with Bobby Nicholson to form a production company, Nicholson-Muir Productions, under which joint banner they created and/or produced a number of game shows including "Concentration," which was initially produced by Jack Barry and Dan Enright and later produced by Mark Goodson and Bill Todman, "The Newlywed Game" which was produced by Chuck Barris, "Pay Cards!