The startling “cold open” for a documentary about 50 years of “Saturday Night Live” music is proof that a musician ... like R.E.M. and Morris Day, Rick James and Duran Duran, Hanson and Cher.

Tune into the Oct. 11, 1975 premiere episode of ''Saturday Night Live'' — then without ''live'' in its name — and you may be instantly surprised at some of the bones of the show that are still intact ...

Lady Gaga, Bad Bunny, Arcade Fire, The Roots and David Byrne are among the scheduled performers for the event, hosted by Jimmy Fallon.