Joe Lycett investigates the mind-boggling quantities of untreated sewage discharged into our waterways every day, and takes the fight to the water companies in the most Joe Lycett way possible.

Quiz and celebration of 50 years of the BBC's second channel, hosted by Dara O Briain. With Richard Osman supplying extra facts and figures, celebrity teams and guest spots from the channel's past and present, All About TWO tells you everything you've ever wanted to know about the channel but didn't know you wanted to ask. It's part celebration, part quiz and all love.