I disagree about the series going nowhere because it is a crime drama. I believe it develops slowly through the episodes and, by the end of the season, you'll realize its plot has gone very far. Each season ends in a very turbulent place and the next one starts with the emotional consequences of the previous. Character growth is brilliant.

Definitely, one of the best crime thrillers ever conceived and written! You will be seduced by it's clever, dark writing and the spectacular performances of Idris Elba and Ruth Wilson (with an excellent supporting cast - too many stand-out performances to name). This is Neil Cross' masterpiece, from creation to seasonal arcs to individual stories to episodic writing, each piece building toward the series' inevitable reckoning, teasing us on with the end of season's tag line, "Now what?" while the soulful plea "I'm just a soul who's intentions are good..." plays, while credits roll. A beautiful study of genius, license vs. boundaries, and the ultimate consequences of each. I give this series a 10 (brilliant) out of 10. [Crime Thriller]

Interesting, the relationship with Alice.