Such lazy writing!! They never once go anywhere near a police station never mind another member of the force! Forget a backstory, these two are detectives on a case, you got it? And look here's Rory Kinnear doing what he does best, eating eggs.
The jokes are offensive and not very funny but there are lots of them and somehow, maybe it's Tobes' charm, it's really quite enjoyable! It's because it doesn't switch, the writers have decided it is half-arsed, and it's consistently half-arsed, there's no sudden plot, it is just cheap and funny shite. Great stuff.