sentences:  Sennett left the show in season three to pursue music with his band Rilo Kiley, but he made one last appearance in season five's graduation episode.First appearing as the bane of Cory's existence at the start of season two, Harvey "Harley" Keiner (Danny McNulty/Kenny Johnston) was a major antagonist and recurring character for about a year of the show's run.One of the gags surrounding his character was the oddball sophistication he added to the bullying trade, often referring to the harassment of underclassmen as if it were a career and to his gang as if it were a corporation.