For those of you who watched Stargate SG-1 and either didn't see the Stargate Continuum movie or saw it but didn't watch the featurettes: If you didn't see the movie (and saw the series), you really should. The key thing, though...
Watch the featurettes--specifically the 21-minute "Stargate Goes To the Arctic" one. Those really strong early scenes set in the Arctic, including the nuclear sub rising through the ice and most of SG-1 getting on the sub, scenes set on the sub, and the sub descending? Great special effects, right? - walt crawford
Except, as the featurette shows, they weren't special effects. The sub was real (and its crew was used for the sub scenes), it really was the deep Arctic, the team and a reduced filming crew spent more than a week in those conditions...amazing stuff. - walt crawford