When you mix Bill Nighy, the BBC and the term "political thriller" in the same pot you get State of Play. As good a mini-series as you could ever hope to see. Watch out for the film remake by Kevin McDonald.
The musings and discoveries of conjoined twins from the planet Cascara who were seperated at birth and went on to live very different lives. One is a Sith disciple while the other loves sushi and cosplay.