I did too, actually, having missed They Keep Killing Suzie, and missing that episode actually makes their kiss at the end of the season make way more sense. :D I found it hard to reconcile Ianto propositioning Jack so openly one episode after Tosh overhears his inner monologue about feeling like rats are gnawing on his insides. I think even so the proposition was Ianto "making sure things run smoothly" more than anything.