I totally did not see the Henshaw reveal coming until this week’s episode started.
Then this week…
When they showed Jemm, my first reaction was “oh cool, hopefully J’onn J’onzz isn’t far behind” since they were tied together pretty closely in the comics. Even related, in at least one version of the DC universe. So the reveal at the end was kinda spoiled a bit, but only within this one episode. Everything before could just as easily been explained by the villain Cyborg (whose name is Henshaw in the comics) as by Martian Manhunter.
I really wish this show had better writing to go along with the great characters and nice effects. The entire bit with Kara upset over not saving random-disaster-victim felt overdone, for instance. She has to have a “I can’t save everyone” epiphany, I get that, but I thought that was a pretty clumsy way to go about it. And the “adrenaline shock” thing at the end, no one had any better ideas than that?