I don't understand people that skip episodes. Just watch the whole thing at least once. Better to see everything at least once than let someone tell you which episodes to watch.
Better to see the good along with the bad, so you can appreciate the good stuff later on. You can always decide to never watch an episode again.
When I call an episode 'Skippable' I mean the second time around.
Except Threshold, Fair Haven, and Code of Honor.