Winnick was not Irene Adler in Sherlock. That was Natalie Dormer (from Game of Thrones and other stuff).
Thanks for clearing it up. I was watching Elementary the other night, and swapped over to Silk on PBS. I was sure it was the same actor, and IMDB confirms it was Dormer in both roles. The pictures on IMDB are not very complimentary, but on Silk especially her sleepy eyes and intelligent smirk were quite fetching.