Episode 20
It was one of those episodes, were on the first half we wonder, was it really worth to watch and the end - it just makes all more than perfect. First - it looked really like Weir said - when things get bad, noone trusts her orders and she said it could be avoided but no - they did it and now they are paying for it. McKay has to solve impossible task again and this time it is huge plan - to get an asteroid in the right place and make Atlanis to FLY. A very impressive sceneries - the drowning of the city, the flying... and the ending - really well done.