Chris Serle takes a dip into water in his look at the BBC's film and videotape library. This week's watery wanderings include a rare bath for Albert Steptoe in Steptoe and Son, Paddington singing in the rain, and a man Water Walking across the Thames in 1951. You can see Compo splash out in Last of the Summer Wine, visit London's lushest loo in On the Throne, and find out how wet the weather turned out to be in 1954 in Fine Weather for Ducks. Guest Ernie Wise remembers 'Singing in the rain' from The Morecambe and Wise Show and talks about his latest work. Water from H to 0 ... There's even Sykes and a Bath. Assistant producer NIGEL CROWLE Director MIKE SEDDON Series producer ALBERT BARBER