Occupational hazard

Rival law-enforcement agencies arguing about which of them should investigate a murder has, of course, been a staple of crime dramas for decades. Rather less common, though, is for the agencies in question to be the Metropolitan Police, the Gestapo and the SS.

SS-GB (BBC1, Sunday), based on Len Deighton’s novel, poses the undeniably interesting question of what this country would have been like in 1941 if Germany had won the Battle of Britain. Its primary answer is that — in every way — it would have been very murky indeed. Again, plenty of crime dramas over the years have created a suitably noirish atmosphere, while cunningly saving on the lighting budget at the same time. But this one takes the commitment to the crepuscular a lot further than most: if it wasn’t for the CGI swastika flags hanging from London’s most famous buildings, there’d be almost no colour at all.