People need to stop treating Walt like he is infallible. He's a genius in the lab but his ego has created a shytload of problems for he and his family and everyone around him. Plus, look no further back to the beginning of the season where he was letting simple shyt that he should be figuring out slip through the cracks because he was too busy having a pissing match with Mike. That's how Jesse was able to come up with these solutions and had them looking like
As far as the Lydia connection with the Czechs. There's a reason why she didn't bring it up. She put a fukking hit out on Mike. She knew Mike wanted her dead the first chance he got. She only gave them the keys to the train heist because it saved her life. With Mike out of the way she felt she could actually do business with Walt and on top of that, it was another way to save her own ass. She even said "what's to stop you from killing me after I give up the list?". She's a smart and intelligent, savvy businesswoman and you can tell that Walt is a little

about her because it's a woman that is on his level of intellect.
Some of you fukkers would be better served to pay closer attention to the details.