Epicureans v Wrights

In the first semi-final, three lovers of luxurious wines and exotic dishes set aside their shared passion to address the challenge of the combined wits of the Wright family. They compete to draw together the connections between things which at first glance seem utterly random, such as completing the sequence: 1950: Soap; 1952: Tea; 1953: Cream, eggs, sweets, sugar; ????