Granville is finding it difficult to deliver the groceries on his ancient delivery bike and sets about persuading Arkwright to buy him a van.

Arkwright takes action when his corner shop is broken into and employs a large dog to guard his property. Unfortunately, the unruly creature is more successful at keeping customers at bay than frightening any burglars who may be about.

Arkwright's idea to involve a public demonstration for the marketing of a product has him tackling shoplifters.