'Twas excellent - I was waiting for this episode all week, as I'd been watching 1-12 whenever I had a meal, thinking the entire first season was all already up on Youtube, but it turned out it was still in the process of being broadcast, ^_^, so I had to wait for 13 to debut on the 30th April, ^_^.
I loved the first few episodes - which had story arcs carried across them. All the other episodes seemed to be pretty standalone / self-inclusive, like those Transformer cartoons designed for syndication, and seemed to carry across cliched ideas that any super hero cartoon could have handled - infestions, zombies, etc, and I thought "Sick Mind" would be similar - rehashing the black plague idea - but wow - what a great surprise there was more than meets the eye, =), and it started to involve Megatron's mind...and wasn't a self contained episode(!). I'm now on tenderhooks as to what happens next, and can't wait to see the next episode, =).
Hopefully now as we pass the halfway mark of the first season we'll see some steady build up towards some kind of finale. Hopefully involving all the of "guest" Transformers returning that we've seen so far.