Honestly with the bag/knitting lady, I thought it was Red Queen. They foced on the red part of the bag, and there was something else that was red, I think her bandana had a hint of red as well. Obviously they could only get Annette O Toole for 1 episode, so they did the thing they did with Lex last year. Cleverly cover the character up as much as they can without showing her face. Maybe Martha realized that Tess went to go help Clark, and in return saves her life? So down the line Tess will owe the Red Queen a favor? I have no clue. I don't know enough about DC comics to take any other educated guesses otherwise.
The slow mo wasn't nearly as overused as it was in the episode Checkmate. That was just annoying. It's bad enough we have to see it in every damn movie. I didn't mind it too much for the punches they threw. Gives the punches more of a powerful look I guess. Nice to see Clark using his brain though, and finding a loopholish kinda thing to stay on Earth.
Darkseid I know though is one of Superman's most powerful villains, and I'm not sure I could see it working, though I didn't see Doomsday working a 2 years ago, and I ended up really enjoying that storyline. I guess the only thing to do is wait. This season is my favorite though by far. Last season is my 2nd favorite. This years only had one REALLY bad episode (Persuasion) and a couple of okayish ones. Other than that, I was very happy with the show as a whole.
As I said to my friend earlier in the week, it's nice to see them following up with storylines in the same season instead of indtroducing something then forgetting it (33.3 immediately comes to mind) and following through on the arcing story comics have. Gonna be a long wait til season 10!