Catalyst, 8pm, ABC Not to be confused with being off one’s face, face blindness is a brandnew disability that you or your kids could have. What is it? Find out on Catalyst tonight. Also, tea leaves. Can they tell our fortunes, or explain how medicines work? Einstein’s long- overlooked tea- leaf prophecy comes true. Sea Patrol, 8.30pm, Nine By the time you read this, we’ll all know if Nine’s big spend has proved a ratings winner or a floating turkey. In any case, tonight’s third episode opening is terrific, with the HMAS Hammersley getting tossed about like a cork in a storm on the open sea. When lightning strikes, it looks for a moment that all may be lost, along with the ship’s power supply. Well, that would make for a short series, wouldn’t it? Down in the engine room, Andy Thorpe ( the wonderful and underrated John Batchelor, pictured) has his work cut out getting the engine restarted: ‘‘ I cannae gie her anymore, Captain, she’ll blow apart.’’ Oops, wrong show. But you get the idea. America’s Hardest Prisons, 8.30pm, National Geographic Tonight’s episode is called Lockdown: Iron Grip , and it features some of the toughest convicts in North Carolina. ‘‘ We’re not used to inmates sending our staff out to hospital,’’ admits a warder at Alexander Correctional. Oh come on, don’t they watch Oz in this prison? Fairly plodding stuff, on the whole. Making the domestic routines of a prison look dramatic proves to be a challenge.