Edi Stark is in Inverness to interview the remarkable athlete Karen Darke. At 21, she was paralysed from the chest down, having fallen while rock climbing near Aberdeen. In the last twenty years she has immersed herself in extreme adventure including sit-skiing across the Greenland icecap, climbing El Capitan in Yosemite and handcycling across Central Asia. Already a paralympic silver medallist, she's looking forward to Rio but not before completing more astounding challenges. She tells Edi what makes her want to do the seemingly impossible.