Hypocrite: Slick claims his actions are to free his fellow clones from what is slavery in all but name, yet his actions cause the deaths of more clones than would have happened otherwise. Rex calls him out on this at the end.
I Never Said It Was Poison: Slick is found out when he inadvertently reveals that the Jedi are gone, even though there is no way that he should know that.
Moral Dissonance: Slick's main motivation; the Republic's vaunted stand for "freedom" is being fought mostly by clones who are slaves in all but name.
Stuff Blowing Up: Slick blows up all of the tanks and gunships as well as the weapons depot, with only four heavy cannons surviving.
Zerg Rush: The battle droids overrun the clone positions at the beginning of the episode with a surprise attack and overwhelming numbers, wiping out most of the force. It's the first time basic B1 droids have been a serious threat on the show instead of comic relief fodder.