The plot of that episode sounds very far fetched with psychics stealing national secrets from government engineers. But I think the CIA and KGB really did try to use psychics.

I thought Martin Mull was decent as the villain, who one could somewhat sympathize with.
Eve Plumb, as with most Brady kids, did not have it easy after being typecast as a Brady kid, with the resultant anxiety and/or depression induced by that not helping. She was decent in the Pied Piper episode.
"Pied Piper", IMHO, is one of the few episodes from season 2-onward that is actually good and didn't rely on cliches such as space aliens, robots, and every other shtick the writers had to churn out (and those cliche-driven episodes were sometimes good, but one could tell they were throwing everything at the show to see what stuck).

Not necessarily rock and roll, but "One Of Our Teenage Idols Is Missing" and "Amazon Hot Wax" we're pop/rock related.

Many television shows have featured rock and roll episodes. And in the late '70s some shows featured disco episodes. I think the closest "Wonder Woman" came to a rock and roll episode was "The Pied Piper". I didn't really care for guest star Martin Mull as a flute playing rock star Hamlin Rule. But I loved special guest star Eve Plumb as IADC supervisor Joe Atkinson's unhappy daughter Elena.

I am glad I am not the only one who thought Dennis C. Stewart resembled Jan-Michael Vincent. Stewart played Leo "Craterface" Balmudo in the movies "Grease" and "Grease 2". He passed away from AIDS complications in 1994.

His name is Dennis Stewart and he's probably best known for being the Leader of the Rival Gang in Grease & Grease 2.