I'm not even going to try to narrow it down, every episode following 'School Hard' (that episode included) was great.

'School Hard' was similar to '28 Sneezes Later' in it having a tense situation that occurs during a lockdown. In fact, that seems to be a recurring episode theme... I'll make a list later. I liked how background characters got a little more spotlight in this episode and the situation overall was just interesting to watch. I was a little disappointed about the Hazmats being revealed as robots, though only because I had predetermined that they were brain-chipped clones or something.

’A. Nigma Prison Blues' was another episode that I liked mainly for the dynamics. This was definitely one of the calmer episodes of the season imo, though it did help me realize that Lynch was the mastermind. It was a pretty funny watch, too.

Speaking of funny watches, 'Tales From Decrypt' was another one that made me laugh. I enjoyed getting to see the Genius clique again, they're probably my favorite other than the DoD. The reveal that Barrage was no longer in control of the Hazmats was pretty eerie the first time I watched it, and even the second time I was still a little spooked.

“The Theme Team" was interesting solely for the sub-plot where Lee was showing VP Victoria the tunnels. By the end of the episode I knew she had something to do with the conspiracy, because no adult is so calm about something like that in fiction unless they're in on it. And looking back, the Tatzelwurm attacking her skirt in the tunnel was foreshadowing.

Those are the only episodes I had serious thoughts on- I think 'Knock Knock' and 'The Dance' are well liked for the more obvious reasons.