''SHE was showing signs of metal fatigue . . . and not always being on top of the subject.'' This is Governor Chris Patten describing Margaret Thatcher in tonight's final episode of the unmissable documentary Thatcher: The Downing Street Years (Pearl 8.30pm). Entitled Wielding the Knife, this episode reveals just how out of touch Thatcher was by her eleventh year in power, particularly with her own Cabinet members who'd grown infuriated by her dictatorial - even regal - manner. Revealing interviews with Nigel Lawson and Geoffrey Howe show the mortal blow to her leadership was her own failure to grasp just how unpopular she had become. OTHER than that there's little to get excited about, unless watching animals doing it is your particular cup of cocoa. Details about The Sex of the Animal Kingdom (Pearl 9.50pm, ORT unknown) are scant, but we seem to recall this doing the rounds in Hong Kong cinemas in the late 1980s, just after the Category III rating came in. The film is what it says, 90-odd minutes of various animals coupling. Wonder what TELA's going to make of it. SUCKERS for old-style war movies will love Codename: Emerald (World 9.30pm, ORT 95 mins), all others should leave the room. It's World War II, and Ed Harris is a double-agent trying to rescue a captured American lieutenant who knows about the Allied plans for the D-Day landings. Predictability robs this ''political thriller'' of any thrills, and Eric Stoltz (Mask) is desperately miscast, looking far too young for his role. BERTIE Wooster (Hugh Laurie) gets into his usual mess in this week's instalment of Jeeves and Wooster (STAR Plus 3.30pm). Under instruction from dragon-like Aunt Dahlia (Brenda Bruce), Bertie visits a particular jeweller's shop to secure a rare silvercow-creamer. He bungles the task, and the creamer is bought by Sir Watkyn Bassett. Aunt Dahlia's next command is that Bertie steal it - sounds like another rescue operation for Jeeves (Stephen Fry). HAVEN'T actually seen the matinee offering Blue Bayou (Pearl 2pm, ORT 96 mins) but it must be worth a look for the combined acting talents of Mario Van Peebles (New Jack City) and Alfre Woodward (Bopha!), two of the most promising black stars in the US today. The story is about a black attorney learning how it all works in New Orleans. THE third day of the 39th Golf World Cup (Prime Sports 2am) comes live from the Lake Nona course in Florida. Thirty-two nations will take part, each with a two-man team. Last year's winners were Fred Couples and Davis Love for the US, and they're defending their title this year. IF you missed the MTV Rocumentary on Aerosmith late Tuesday night don't fail to catch it today (MTV 8pm). It's hilarious. This could have been the programme that inspired Rob Reiner to make his brilliantly accurate parody of the rock documentary This is Spinal Tap. The inane platitudes spouted by cerebrally-challenged lead singer Steve Tyler and the rest of the band, match any in Reiner's satirical film. WATCH out tomorrow for live coverage of the five-nation Diamond Jubilee cricket tournament being played in India. The competing nations are India, South Africa, Sri Lanka, West Indies and Zimbabwe. First one-day match is between South Africa and the West Indies (Prime Sports, 11.30am) and Sunil Gavaskar will provide the commentary.