All right, so I’m not infallible when it comes to the demise of shows. Last week I said The Bob Costas Show had been canceled when, in fact, it has only been dropped by my local NBC affiliate. Still, want to bet this is the last season for The Cosby Show? You Bet Your Life. America’s best-loved paterfamilias has been in his hometown of Philadelphia taping tests for a remake of Groucho Marx’s old game show. Apparently the mighty Cos wants to jump like a Pony Express rider from project to project without a respite. Good strategy. As the saying goes: Idle hands make Leonard Part VII.