But when the series moved into the 1970's,was there any music in the 1970's episodes?

Mickey Dolenz played an old family friend who was a rock and roll singer in one episode. And Katie sang in a nightclub in another episode after Robbie left for South America.

Uncle Charley's string quartet performed in early 1970 (Season 10, "Charley's Cello").

Let's have a look at some music superstars who appeared on the series. First up, beautiful Jackie DeShannon:

http://userserve-ak.last.fm/serve/_/38756961/What+The+World+Needs+Now+Is++++Jackie+DeShannon++T+JDS.jpg

Next, Jeremy Clyde of "Chad & Jeremy"

http://www.chadandjeremy.net/cj/hist4_files/jlate70s.jpg

Jaye P. Morgan guest-starred in an ep, alongside Robbie and "The Greefs"

http://upload.wikimedia.org/wikipedia/commons/thumb/6/67/Jaye_P_Morgan_1968.JPG/220px-Jaye_P_Morgan_1968.JPG

And Micky Dolenz of "The Monkees" did indeed appear late in the series, as Old Grouch pointed out:

http://ilovemickydolenz.com/wp-content/uploads/2012/10/20121024-125914.jpg

I just saw Jaye P. Morgan on the other day with Robbie's group.

Jaye P. was also in one of the b/w episodes as a night club singer Steve bumps into in the park one night. :eek: Wish I could bump into Jaye in a park.

Thanks for the additional info on Jaye P. Morgan.

I neglected to include Jan Clayton, noted broadway singer, who appeared in a color episode in which she wants to marry Charley and travel the world. Jan is well-remembered for her work on the earliest Lassie TV seasons, as Jeff's mom Ellen Miller. Here's a look at Jan from early in her career:

http://www.latimes.com/includes/projects/hollywood/portraits/jan_clayton.jpg