The Batfan writes...

This series just keeps getting better and better. "Misplaced" finally gave us another episode where Klarion is the main villain, and brought back Doctor Fate for good - two things I'd certainly been waiting for. It also gave us a hint that each of the members of the Light has his own "crew", as it were - and that, as befits a lord of chaos, Klarion's bosts elemental power. The other side of this was really showing off Zatanna, and finally inducting her onto the team, albeit under circumstances no one would have guessed. All in all, one of my favorite episodes so far.
But even "Misplaced", with all its titanic magic - and I love that stuff, I'm a fantasy buff - can't beat the simple, paradoxically heart-warming beauty that was "Coldhearted". I know the crew was especially proud with this one; they have every reason to be.
It was great to get some more insight into the unfolding mystery that is M'gann, and "Image" really showed us some more of who M'gann really is - and I'm not talking about her "true" form. I had already suspected the White Martian bit, as had many; I am referring to the twist, that she actually hates her "true" form, and has adopted a new identity because that's who she wants to be. As she says to Superboy, "I do it for me." So the M'gann we've seen so far - in terms of personality - actually *is* the real M'gann. And I think that's great.
"Agendas" - well, this one was puzzling. The bit about the human DNA was a nice twist, which I did not foresee, even though others did (I honestly thought his Kryptonian powers were simply still developing). From there, the fact that Luther was the donor was foreseeable - and that he would try to butt-in as Superboy's father-figure, in Kal-El's absence, was the logical and expedient route for taking back Cadmus's super-weapon.
Those "shields" intrigue me, though. How is it possible that an electrical pulse or chemical mixture (I'm assuming it's not magic, since Lex said he developed them, and since magic generally does nothing good to Kryptonians) could "suppress" a good chunk of Superboy's genetic makeup - the delicate code that makes him look the way he does and forms part of the basis for who he is? I know, I'm supposed to suspend disbelief here - but this came so suddenly, so out of the blue, that I'm having trouble with that.
I know you don't really like this kind of question, and I'm sorry to bug you with it, but I really didn't get this and I would really like to. Where did the idea of the shields originate, and how do they work?
Thank you for your patience, and your amazing creativity that makes us love this series.