1. What I Don't Understand Is This...

Jazz-loving, woodship teacher Trevor Chaplin and his girlfriend Jill are on the trail of a saleswoman who mistakenly delivered a set of records that were supposed to be by Bix Beiderbecke.

2. Can Anybody Join In?

Jill is detained by the police, Trevor goes in pursuit of a platinum blonde, Big Al reveals some of his secrets, and Sergeant Hobson tries to make sense of it all.

3. We Call It the White Economy

Trevor has succeeded in finding the music he's been looking for and Jill's campaign is reaching fever pitch. But who is the mysterious supergrass and the woman 'with a past'? Will the truth ever be revealed to Hobson?

4. Um... I Know What You're Thinking

Trevor is at the apex of an emotional triangle, Hobson is in trouble, and Jill is taken out to dinner.

6. We Are on the Brink of a New Era, If Only...

Somehow, a bizarre twist of fate plunges the couple into a mystery involving bureaucracy and death threats. All is revealed: will Hobson find fame and glory, will Trevor and Jill find true happiness, and will Mr Carter ever really understand his two colleagues?