THE PREMISE What's Happening!!'s teens are all grown up: Raj (Ernest Thomas) is married; Dwayne (Haywood Nelson) and Rerun (Fred Berry) are roommates; sassy waitress Shirley (Shirley Hemphill) co-owns the local hangout.
BEST EPISODE In ''The House Guest,'' beret-wearing Rerun channels Hugh Hefner (love the bathrobe!) while wooing a lady at Raj's pad.
TWO DECADES LATER... The clunky jokes and incessant mugging grate. To paraphrase Rerun's classic line: ''Nay, nay, nay!'' D