Just re-watching Blue Lights (we've finished season one, just about to start season two) in advance of season three... and since I watched it the first time round I had forgotten how good it is; makes you realise how lame so much police-based/crime-based drama is.
If you've not seen Blue Lights I cannot recommend it highly enough; it really is quality, engaging, humane TV that packs a punch.
Its on BBC IPlayer in the UK (and I believe via AppleTV abroad).