Spoiler Level: Kinda' High-ish.
Once again, lots of great comic tributes in this episode. Franklin Stern, owner of the Daily Planet in the comics, although now he's the new editor. (And along those lines-- do they feel they can't use Perry White now that they introduced him way back in season one or two or whenever it was as played by Michael McKean?) And Maxwell Lord was a nice surprise. Were his mental powers a more recent revelation or did he always have them? And of course Lois Lane in a Playboy Bunny outfit. Well, okay, I don't remember that having been done in the comics, but I figure after all these years someone had to have done it sometime.
Best of all though was the classic love triangle of Clark, Lois and Superman. (Or the Blur, rather.) Very nicely done. Although they're building up such a good case of why Clark can't go public or reveal himself to a loved one that I can't see how he can ever become Superman.