Jim Lindsey (James Best) comes back to Mayberry ("The Guitar Player Returns," Episode #31) and tells all about his big successes with Bobby Fleet and His Band With a Beat. In fact, he has become such a success, he decides to leave the band.
When his solo career leaves him singing the blues, he's too proud (and maybe just a little stubborn) to ask Bobby if he can rejoin the band. There's nothing to fret about, though. Andy is there to restore harmony.