He hires Derrick to build some shelves in his home office. Derrick's happy to have a job which involves building something, using wood. Gavin is also an interesting person to Derrick. He seems to be flirting with him, but Derrick is not sure. He's been celibate for ten years, so his flirting game is rusty as rusty can be. The initial job ends, but suddenly Derrick is being called back for extra work at Gavin's place. It is obvious that Gavin has sabotaged whitegoods, and his toilet, but Derrick is a bit flummoxed as to why the confident suit, Gavin, is doing that. Why is he interested in him? And what's worse, once he gets some flirting going on himself, which is no mean feat, why Gavin shuts him down every time. Then there is one more occasion for Derrick to come back. Something that is of an angry nature to do with a door that needs repairing. Did Gavin do that? If so, why? If not, who did?