Awesome casting news - they have found their Irene Adler:
So hot, so perfect as the woman. Some awesome things of note:
1, she is a poker fan so we could see an awesome poker scene with Sherlock and Irene when they first meet (but probably not)
2, she is a member of the London Fencing Academy so is obv well skilled at going for the pate
3, if you were a genius you would also fall in love with her
Edit, she will be on the episodes May 9th then the two part extended finale May 16th. Moriarty first appearance to finish the season perhaps?