If you haven’t watched Blue Lights, the cult BBC police drama, you’ve got some catching up to do. Sarah Rainey takes a look behind the scenes of the most talked about show on TV…Belfast police drama Blue Lights has been getting rave reviews after returning for its third season on BBC1. And it’s not just romantic relationships the Blue Lights writers have nailed so convincingly. Series three takes Blue Lights into the world of organised crime and the shady underworld of drugs gangsTHE MURKY WORLD OF ORGANISED CRIMESeries three takes Blue Lights into the world of organised crime and the shady underworld of drugs gangs. Viewers will see Grace, Stevie and co inadvertently take on a group of gangsters who have invented a delivery app for premium-grade cocaine.