Each week a party of three people visits the planet Arg to challenge His Highness the Rangdo to a battle of wits.
They face various problems including the traditional Arg Drogna Game. This is played on a grid of different shapes and colours, and the winner receives the Great Crystal of Arg. Can the earthlings defeat the logic of the Red Salamander of Zardil?
This week's Earth visitors: Sarah Greene , Anne Miller and Richard Stilgoe Residents of Arg:
Director CHRISTOPHER TANDY Producer IAN OLIVER (R)