We've become rather hooked on the most recent season of Who Do You Think You Are?, not least because of the fascinating stories that have emerged over the past few weeks. Tonight we're joining another familiar face, comedienne Sarah Milican, as she aims to trace her family history. There's nothing conventional about this very funny lady so it's hardly surprising to hear that her family history is just as colourful as her stand up routines. Seems her great great great grandfather was one of the world's first divers. Imagine that.