Paul McCartney acted as a stand in for Paul Stookey of Peter, Paul, and Mary in the photo below from 1968. Luckily for them, they could essentially keep the same band name.

While he made an undeniable impact on the music scene of the '60s, Yarrow was convicted in 1970 for "taking indecent liberties with a minor" and served three months in prison for the offense. He was ...