Sherman's Showcase is a hard show to explain but a very easy one to fall in love with. The creators of one of the smartest sketch comedy series being made today have "35 to 40 years" of comedy experience between them, but writers Diallo Riddle and Bashir Salahuddin still get surprised by reality. Their IFC sketch comedy series features a conceit that lets them experiment with all sorts of genres, as the series is framed around a fictional long-running TV show hosted by the titular Sherman (Salahuddin). While the show is reminiscent of Soul Train and other variety …