My skin cralwed when Sloan put his hand on Syd's shoulder that one time. My mom even said something about that too.
Ok as for Irina, yeah I knew about it, and it makes sense now that I've seen the episode. I don't know if I'd say they should have killed her off before when Lena refused to come back, because it was interesting the way last season played out, with Jack in constant contact with Irina and how they seemed like a couple at times.
Loved that clanging when the guy fell out of the train as well, cracked me up.