If you’re looking for something to do this Sunday evening, Sept. 14, check out this week’s episode of PBS’ Nature series. Supersize Crocs will be airing, which follows crocodile conservationist Romulus Whitaker on his search for the last of the crocodile leviathans — those that are longer than 20 feet. His search includes areas such as Ethiopia’s Lake Chamo, the riverbanks of India’s northern border with Nepal and the Adelaide River of the Australian outback. He fears that there are none left, thanks to irresponsible hunters, but you’ll have to watch to find out. Click here for local listings.