The communication with the future was finally explained ("while the portal is open") and the symbols were mentioned again.
I enjoyed the story, the jokes ("You shot me!" - "I did, sir." - "Good job!") and the action of What remains - especially the dino action. I don't regard it as "poor CGI" - at least it's good enough for me.
As far as I'm concerned, Terra Nova is much to happy-family-ish to ever get a 10 rating from me, but it definitely stays on my watch list after this weeks episode.