I really loved this one - this was the one that made me heave a sigh of relief and acknowledge that the writers were writing a real relationship for Jack and Ianto; and they were doing it really well, with real care for the characterization of both characters. I just loved the ease they have with each other, and you get a softer, more relaxed version of both characters. They seem so comfortable together!

I also liked the atmosphere of this one, and I'm quite resigned to Torchwood's plots not making any sense :)