One episode of MG/HS had Chuck Woolery, Arlene Francis, Jon and Gene, Jamie Farr ("Wordplay"), McLean Stevenson (MG sub for 1/2 ep) and if you allow me to stretch the boundaries, Arsenio Hall (GSN's Star Search.) To the best of my knowledge, Jamie Farr, who was on virtually every other celeb. game show on TV of the era, never did CBS MG.