Always enjoyed LG as TGG host. Thought he was a much warmer, funnier, humbler presenter than Bruce Forsyth (professional as BF was). And he worked wonderfully well as a duo with Isla St. Clair.
no, there were five series of the Muppet Show made by ATV and the last ran in 1980-81; at this point, ITV was showing the fourth ATV series. The John Denver special shown here was produced separately and sold separately, although no doubt as a spoiler, the ATV-produced edition of the regular Muppet Show which also featured Denver was networked by ITV the previous night!
Bruce Forsyth presented The Generation Game in the early to mid 70s , then he went over to the rival ITV channel and Larry Grayson took over hosting The Generation Game .