Seinfeld Pearl, 9pm The ninth season of this hit comedy kicks off tonight. Jerry Seinfeld stars as a stand-up comedian whose life in New York City is made more complicated by the quirky friends who join him in wrestling with life's most perplexing, yet often trivial questions. Starring Julia Louis-Dreyfus as Jerry's ex-girlfriend, Jason Alexander (above left with Louis-Dreyfus and Seinfeld) as George Costanza, Jerry's neurotic hard-luck best friend, and Michael Richards as Jerry's eccentric next-door neighbour, Kramer. Tonight, George is on crutches and looking for work, Kramer experiments with butter as an alternative to shaving cream, Elaine goes on holiday to Europe with her boyfriend and Jerry suspects a rival comic, Kenny Bania (Steve Hytner), of stealing his ideas. Lost In Everest's Death Zone World, 10pm At noon on May 13, 1999, 22-year-old Michael Matthews became the youngest Briton to climb Everest. Four hours later, he was the 162nd person to die on the mountain. Everest is the ultimate challenge for mountaineers but one in every seven who climb the mountain dies. Since the mid-1980s, commercial expeditions have been offering guided services taking amateur climbers to the top of the world for large fees. To some Matthews was an inexperienced climber, but the other clients on his team claim the expedition was an accident waiting to happen. All About Pregnancy: Ultimate Guide - Pregnancy Discovery, 10pm Discovery is having a five-day celebration of childbirth this week. This series of programmes examines ovulation and conception, how embryos develop in the womb and the incredible advances being made in fertility drugs and reproductive technology. Later in the week, we are given an insight into how the experiences of women during pregnancy and childbirth vary from one country to another and the changing role of expectant fathers.