Scorched Earth: That was pleasant, if a typical episodic piece of sci fi problem solving. It seemed at the end though that O'Neill really regretted not getting to blow that massive ship up.
Unasked: Is it really okay to exterminate all the life on an entire planet just because none of it is technological or as intelligent as humans? All the squirrels, deer, rabbits, eagles, whales, dolphins, cats, dogs, monkeys, koala bears, chetahs, elephants, spotted owls, talking geckos, honey badgers, songbirds, horses, whooping cranes, bats, tree sloths, parrots, hippos, sea otters, polar bears, and jellyfish- on an entire planet - go extinct, and everybody is okay with that?
Jack should've blown up the ship.
It may not have seemed like it, but his was the moral choice.