The BBC has a couple of crackers at the moment.
The Seven Noble Kinsmen and Death in Sakkara. Old school point and click adventures with the occassional arcadey bit, well, Sakkara is. I'm not so sure about Kinsman as I've not had long enough to go through it, but in both cases they are well-made with great porduction values and compelling, if, perhaps, a little hackneyed, stories.
I first found these through Jay Is Games, of course.