I liked this episode and thought AT did a great job. I called the double play but didn't catch the the triple play so I wasn't surprised she took out 5th but was surprised she made herself the new big bad.
The one thing I thought was odd was Robot Carter coming back through the gate to release her arm. I thought the gate only went in one direction so you couldn't come back. Maybe that is only if you go all the way through. However, I just watched a episode of SGA where a ship got stuck in a gate and they made it a point to state they couldn't back the ship out.