Finally, this Whovian has watched, in my opinion, a real episode of Doctor Who for the first time in years since Steven Moffat took over Production of the show.
Cold War took some of the finest aspects of the last 50 years of Who and molded it into a well crafted and wonderfully executed episode. It wasn't the best story, but it was enjoyable and more than anything else, it served a purpose - it reintroduced the terrifying Ice Warriors!