Exile - BBC1, 9pm.
It's running for three consecutive nights. If you missed the first one you can catch it on iPlayer, I expect.
I enjoyed it ... if that means anything at all to you.
It's advertised as a Thriller by the promoters ... certainly the drama is very good, with plenty of questions to ask yourself and encourage you to keep watching to find out the answers. :)
Great acting too - it's worth watching for that alone! But it has sooo much more. :)