There's very little to add to the headline because this is that one rare program that comes around every now and then on which you really can't think of ways to improve. Well-written, well-directed, well-set, and above all, with a bravura performance from Ben Whishaw -- who is somehow able to make a character both unsympathetic, sympathetic, cold, warm, hostile, sweet, and every other possible human characteristic. The rest of the cast is outstanding as well, especially Ambika Mod as the bedraggled young doctor doing her best, and Rory Fleck Byrne as Harry, doing his best to put up with the boyfriend who's barely present. (The show is also a blistering commentary on health care in the UK, making you hope you never get sick there).
The only possible improvement would be another season. Or two. Or more.
The only possible improvement would be another season. Or two. Or more.