“Desperate Housewives” (9 p.m., ABC): “Desperate Housewives” doesn’t

“Desperate Housewives” (9 p.m., ABC): “Desperate Housewives” doesn’t kick off its new season for two weeks, but you might want to catch up with things by watching the rerun of last spring’s season finale. It set the tone for big changes with a flash-forward sequence that propels the characters five years into the future.

“Secrets of the Dinosaur Mummy” (9 p.m., Discovery Channel): Leonardo died young, just 3 or 4 years old. But he would be remembered, even down to his last meal’s menu items (leaves). A four-legged duck-billed dinosaur, Leonardo was discovered in his 20-foot-long splendor in the Montana badlands in 2000, about 77 million years after his life was cut short. Now a Discovery Channel special, “Secrets of the Dinosaur Mummy,” gets up-close-and-personal to profile this young Brachylophosaurus. Skin impressions and fossilized samples of the digested food still inside Leo’s abdominal cavity, plus skin and joints, have allowed scientists to create the first reconstruction of a giant dinosaur, theoretically accurate both inside and out. But that’s just the beginning of what Leonardo can convey about a world long past. Better late than never.

“Entourage” (10 p.m., HBO): “Entourage” continues with a fresh episode that has Ari struggling over how to tell an oblivious Vince that his career is in danger of plunging into the toilet. Tony Bennett and Mark Wahlberg appear as themselves.