Full disclosure here. Grimm is one of my all time favourite tv shows so this may not exactly be the most unbiased review you'll read but I'll do my best!
If you've never watched it then you are missing a treat. With all six seasons available on Amazon this is a fantasy drama you can definitely binge on but be warned, once you start watching, you won't want to stop until the very last second of the very last episode (123 in total). So what is Grimm all about? It's Portland in 2012 (ish) and Detective Nick Burkhardt learns from his dying aunt that he is a Grimm – a guardian who is sworn to keep the balance between humanity and mythological creatures, known as Wesen (pronounced Vesen).
It would seem that the Grimm fairytales were less about cute bedtime stories for kids and more about documenting the actual evolution of Wesen through the centuries and it is this catalogue of tales that Nick must use to battle against an assortment of dangerous and often murderous creatures who hide behind the everyday faces of the people around him. Luckily he has friends on his side including his Wesen friend Monroe and his police partner Detective Hank Griffin. Life gets pretty tough for Nick as he tries to contain his secret and carry on with life as normal but with more and more Wesen related crimes taking place in his home town, explaining them away gets very tricky indeed particularly as Wesen can also see that he is a Grimm, a man traditionally associated with killing them.
As the seasons evolve so too does the story which goes deeper and deeper into the history of Grimm V Wesen but it moves at an incredibly fast pace, is funny in parts, horrifying in others and overall is a fantastic balance of drama, crime and fantasy. The cast of characters develops so well that the twists and turns through the seasons merge seamlessly culminating in one whole story that has a beginning, a middle and an end, all wrapped up beautifully with a bow on.