Predators World, 8.55pm Meet the 'James Bonds' of the animal world. Armed with ray guns, power drills, harpoons, minefields and even airbags, these 'special agents' have a licence to kill. Gannets hunting for fish are like guided missiles. Plummeting from 30 metres up they hit the water at 100km/h - like smashing in to a brick wall. But they emerge unscathed as their heads are designed to withstand the impact. In the Namib desert, corolla spiders build beautiful but deadly quartz minefields. Long before humans realised it, these spiders had worked out that quartz (which is now used to regulate wristwatches) transmits vibrations with no distortion. The spider builds a tiny quartz stone circle around the brim of its burrow, attaches fine silk threads, rests its legs on the silk and waits. A passing ant brushes the pebbles, sends vibrations down the threads and tells the spider when and where to strike. The second half of this BBC nature programme looks at how a predator can have all the senses and weapons in the world, but unless it has the right strategy, it will fail. For instance, a lioness attacking a zebra from behind soon gets kicked off, but approaching from the side immediately increases her chances of a kill. As for polar bears, their best strategy to catch a seal is to find a breathing hole that is used regularly and wait patiently for one to surface. However, seals are not stupid. Every time the bear puts its foot down it sends shock waves shooting through to the water below that are picked up by the seal's sensitive whiskers. Polar bears are successful only 10 per cent of the time at a breathing hole, but in the harsh Arctic winter they have no other strategy than to play this waiting game. 60 Minutes World, 10pm In one of tonight's segments, Vice-President Al Gore talks about the Florida circuit court hearings and how he is faring in the battle for the White House. The American current affairs show also speaks to a former policeman who claims the police force took revenge on him and his family because of the crimes he uncovered while heading its internal affairs division, and a couple who accuse the FBI of entrapping and convicting them of espionage despite being protected by the Foreign Intelligence Surveillance Act. Two Guys, A Girl And A Pizza Place Star World, 8pm This American sitcom about two immature graduate students, though slightly puerile, is actually quite addictive. Aspiring architect Pete (Richard Ruccolo) has to choose an extracurricular course. Being sensible and boring, he picks metallurgy but his flatmate Berg (Ryan Reynolds) thinks Pete should have some fun in his final college year, so he secretly changes the option to sports broadcasting. Pete soon learns to enjoy his newfound fame as a sports commentator. Meanwhile, Sharon (Traylor Howard, above with Ruccolo and Reynolds) tries to prove her boyfriend is not as dumb as he looks.