The Thin Blue Line

It is the tenth anniversary of Fowler and Dawkins' relationship, but Fowler manages to forget, being instead more concerned with the Queen's Official Birthday.

Grim and the CID initiate a counter-terrorism operation, Fowler deals with mythomaniacs and Habib becomes attracted to a fireman.

Dawkins is furiously jealous of Fowler's admiration for Habib, albeit as star of his pub quiz team. That worsens when CID needs her as sexy, secret bait for a 'honey trap'.

When Rag Week begins, the Gasforth police deals with students' pranks and bank robbers.

Pestered by his ex-wife, Fowler reluctantly agrees to let his son Bill stay with him and Dawkins for a fortnight. When Dawkins overhears Bill making love to his girlfriend in the bedroom, she becomes envious and attempts to talk Fowler into going to see a sex therapist.

Fowler and Grim clash over their views of handling juvenile troublemakers so they decide to take them on a retreat. Further tension arises when Goody punches a teenage skinhead for racially abusing Habib and is subsequently charged for assault.

Goody buys Fowler a puncture repair kit and Habib some lingerie, but accidentally gives them the wrong presents, and matters are made more complicated when Dawkins believes the lingerie is a gift for her from Fowler.