In this episode, two pairs of identical twins are finding out the best way to learn a language - putting the two most popular styles of learning head to head in self-taught versus taught. With 65% of us saying we would like to be able to speak another language, this test will determine the best way to go about it for you! Chris has arranged for Des and Tina go back to school to learn a language from scratch. With 30 hours of scheduled lessons over four weeks with a language teacher, they are going to have to make space in their busy schedules for this real-time contact. The pros to this process? Des and Tina are safe in the knowledge that the guidance they are receiving is pre-planned, and they get real time feedback on their pronunciation and progress, but is it all a bit old fashioned? To find out, Xand has set Nick and Lia loose to see if self-teaching is now advanced enough to take on the teachers. In addition to phrase books, there is now an abundance of options available for the budding linguist, via smart phones, online videos and internet radio. Apps now offer the flexibility to learn whenever and wherever they choose and with millions of us now using them every day, we find out if they can really hold their own against the tried and tested method of face-to face communication. But without a teacher it will take dedication and self-discipline for our twins - is this just too much to achieve alone? Next is a story that sees Chris and Xand put their identical twin bodies on the line in a quest to look younger. A recent survey suggested that the average woman in Britain spends £1,300 a year trying to reduce the effects of ageing, But in an industry cursed with bad science and outlandish claims, is there a technique that could work? Chris and Xand opt to put two techniques head to head that come from opposite ends of the spectrum. Xand is going to spend a month doing an hour of facial yoga every single day for a month. Although the science of facial yo