DON'T MISS: "The Last Sharknado: It's About Time" – The nutty, low-budget film franchise that dared to imagine the meteorological mayhem that occurs when man-eating sea creatures rain down from the sky is calling it quits. The sixth and final installment picks up right after the conclusion of "Sharknado 5: Global Swarming," when Fin (Ian Ziering) was seen wandering a decimated Earth while lugging around the head of his bionic wife (Tara Reid). Now he must travel back in time (of course!) to stop the Sharknado that started all the destruction. Our forecast? Utter insanity. (8 p.m. Sunday, Syfy).