Spoiler Level: High
Another good entry, albeit with a few complaints that probably aren't worth getting into.
Miko and Bulkhead are in the spotlight again; When Ratchet detects that some Energon has been detected in Greece, Miko and Bulkhead investigate, only to discover an ancient painting of a Cybertronian artifact: and Energon Harvester, capable of extracting Energon directly from the ground. Or worse yet, from the body of a Transformer. From there it's a race between the Autobots and two new Decepticon characters, Knock Out and Breakdown, to find and retrieve the artifact first.
Knock Out and Breakdown are cool characters; they're both vehicles, which is cool from the start. Starscream's open disdain for any Decepticon on wheels suits him well. I kept recognizing Knock Out's voice, but couldn't place it; turns out he's voiced by Daran Norris, who played Gordy on Ned's Declassified School Survival Guide. He also voices Cosmo on Fairly Odd-Parents, but he uses a completely different voice for that one. The things I learn from my daughter's TV habits. Breakdown, on the other hand, is one of those big, silent types who doesn't say much, but prefers to speak by blowing stuff up. He's not totally silent like Bumblebee or Soundwave; more like he only says a few words when the time is right, like Silent Bob. Or Ferb. And they don't leave at the end of the episode, so perhaps we'll actually get to see them again.
I'll go ahead and get into my complaints anyway. Bulkhead figures out where Starscream's going to go, but doesn't work it out until after all the other Autobots have rolled out. He does seem to have at least clued them in so they could show up when the action's ended. And if Starscream keeps killing his own troops (and taunting them that he could kill them), I can't imagine why Knock Out and Breakdown would stick around. Perhaps they won't.
Oh, and it was good to see Megatron again, even if he is still offline.
So all in all, an enjoyable outing. Here's hoping we'll be seeing more of the expanded Decepticon army.