Based on the best-selling books of the same name, The Witcher is yet another fantastic fantasy show, and has Henry Cavill, which is enough to convince some people I'm sure.
A 'Witcher' is someone who has undergone a certain ritual to become somewhat monstrous in order to fight against the worse monsters that lurk around the world. Geralt is one such Witcher, a solitary lone-wolf tasked with travelling the land eradicating deadly foes for coin.
His journey is an unusual one, and if he had his way he would continue going off into the worst places of the world alone, but people keep sticking around so maybe he'll be slightly less reckless.