“Hey, hey, hey” it’s the 1970s and Bill Cosby’s on a circuitous path to becoming an on-screen educator and moral authority – a man we thought we could trust. Whether he’s telling kids to say “no” to drugs or allegedly offering pills to young women, Cosby proves himself relentless, and his ambition propels him to new levels of acclaim with 1983’s stand-up special “Himself”.