Granville encourages Gastric to express his artistic side in a local art competition, but he throws himself into self-expression more enthusiastically than anyone could have predicted. Meanwhile Granville has bought a large collection of mystery tins. Unfortunately Leroy and Granville are still none the wiser on the contents after they've opened one. Now they face the ultimate challenge - how can you sell something when you have absolutely no idea what it is?

Madge and Mavis are about to leave the area. Granville sets up a big night out in a pricey restaurant so he and Gastric can persuade their lady loves to stay. The only problem is that Granville's money belt seems to be tightening every time anyone looks at the menu. Meanwhile, Leroy's romance with Beth finally seems to be getting somewhere, but the time has come introduce her to his father. And Granville has come up with the perfect way for Eric and Cyril to get their wives' attention: make sure there are rumours that they have been seen out and about with another woman.