Sam Walker presents a series of in-depth interviews with people who changed their lives after life changed them.

John Joseph is an Iron Man athlete, a published author and lead singer of a seminal punk band. He also experienced nothing but violence, crime and abuse for the first decades of his life. If violence is all you have ever known - how do you change who you are?

And Matthew Syed is a journalist, writer, broadcaster and champion table tennis player. But at a crucial point in his career- something happened that he admits changed him forever. If you've been building your whole life to one moment and at that moment you fail- how do you carry on. Show less