They say that blood is thicker than water, and this documentary puts that to the test by examining the brothers who have formed and fronted rock bands. From the Everlys to the Gallaghers via the Kinks and Spandau Ballet, it tells the stories of the bands of brothers who went from their bedrooms to become household names - often with a price to pay. With contributions from Martin Kemp, Matt Goss, Dave Davies, Phil Everly, David Knopfler and the Campbell brothers of UB40.