Brian Cox and Robin Ince return for a new series of the award-winning science/comedy show, as they take a witty, irreverent and unashamedly rational look at the world according to science. In today's programme they'll be looking down rather than up as they consider the great mysteries that still remain uncovered in the watery depths of our oceans and asking whether they are truly the last unexplored frontiers for science. It has often be said that we know more about the surface of the moon than we do about much of what lies beneath the ocean waves, so how come we know so little about the vast majority of our own planet? They'll be joined on stage by comedian Dave Gorman, British Antarctic Survey scientist Lloyd Peck and Bramley Murton from the National Oceanography Centre in Southampton. Presenters: Robin Ince and Brian Cox Producer: Alexandra Feachem.