This was great, and I love how despite being a more bottle episode away from the main plot, there are elements from that woven into the story. It really builds up the ongoing situation and its really quite cleverly done. As for Naomi and Harry I still don't care for them, but its nice to see what they got up to in the gap between the 4da's and 7da's. The concept with the Ice Warriors was rather neat, but I do wish they had managed to save the Ice Warriors life.