SEASON FINALE: What a triumphant season for Amy Schumer – a Peabody award, a new movie about to open, and a series of shows, this year, that started boldly and brilliantly and never slowed down. Tonight’s season finale presents the usual number of titillatingly twisted sketches – including one in which Amy plays a witch accused, in Puritan times, of cursing the town’s menfolk… with what sounds an awful lot like a series of cases of STD.