Broadchurch

[King Bob]

I saw that this got a mention on the TV season thread, but only the title. Watched it on a friend's recommendation. David Tennant and Olivia Coleman are police investigators in a seaside English town, and a boy that she knows is murdered. That investigation is the first season, the trial pretty much is the second, and another case is the third and final season. Both leads were very good, and she gets to do a lot more than in The Crown, where it's pretty much just being keeping a stiff upper lip. HP connection: David Bradley (Filch) as a shop owner.

No sword fighting though, so maybe not for you.