Isnt Tywin supposed to allow Tyrion to take the black?
I get confused when the show gets to conclusions ahead of time...
1. Tyrion, did you do it?
2. Tyrion, will you confess and take the black?
3. I will let the gods decide and get a champion (behold Mountain is Cercei's champion - note, not Tywins - then Oberyn is all over this.
Also, I wanted Tywin to take a glass of wine from Oberyn. The one that gives him a two week constipation (yes, I strongly believe this theory).