Stupidity: Characters repeatedly make note of how hard to kill the Wraith are, but sometimes, especially in the final episode(s) of season 1, they go down easily in a few bullets each, and then don't even regenerate as the characters turn their attentions elsewhere.
Upvote valid corrections to help move entries into the corrections section.
Suggested correction: It's explained that Wraith are easier to kill the less they've fed recently, and that in later seasons, with more and more Wraith waking up, fewer and fewer are getting chances to feed before they fight the Atlantis Team.
The Passion of Conner - S1-E28
Stupidity: For some strange reason, Conner powered down from Triassic mode before battling Zeltrax.