The Adventure Show is in Torridon for the Celtman Extreme Scottish Triathlon, an event which starts with a 3km open water swim that is followed by over 200km of biking. The finale is a 42km run, with an ascent of one of Scotland's Munros thrown in for good measure. It has been described as one of the toughest days of your life and, for most, just finishing is a major achievement. Elsewhere, the Adventure Show joins two intrepid athletes in their attempt to set a new record by running up Scotland's ten highest mountains in a day. And the programme visits Shetland, where a group of local activists have discovered that these northern islands offer superb sea cliff climbing.