The first time Paul Simon appeared on Saturday Night Live was very early in its first season, in 1975. The most recent time he appeared was two months ago, and this show, hosted by Seth Meyers, is a repeat of that program. Among the performances, with arrangements and collaborators drawn from Simon’s just-completed (and outstanding) farewell concert tour, are “Bridge Over Troubled Water” and a dazzlingly original version of “Can’t Run But,” with Simon on vocals and the New York chamber ensemble yMusic providing a soaring and swooping instrumental backup. Take advantage of the opportunity to hear Simon in this October rerun – and, oh yes, Seth Meyers is very funny also.