'How I Met Your Mother' - 'The Drunk Train': She's the one?

HitFix's Alan Sepinwall reviews "The Drunk Train," the February 13 episode of CBS' "How I Met Your Mother," in which the show revisits a familiar story that not everyone may be happy about.
http://www.hitfix.com/blogs/whats-alan-watching/posts/how-i-met-your-mother-the-drunk-train-shes-the-one