Finally, the Sarah going insane arc is over. It's not that I didn't enjoy a trip into her psyche over the past few episodes, but it just felt a bit superfluous in the scheme of the show. Especially knowing that this may be the final season of the show, it would be nice if they kept the pace up. **SPOILER ALERT**
We find out in this episode that Riley's role in John's life was to die at the hands of Cameron, thus turning him against his metal companion. I thought it was very cleverly written, with Jessie posing as a guidance counselor and selling Riley down the river. The start of the episode was also well done, with Cameron inadvertently killing a bird that she wanted to free. This was later juxtaposed with Riley and Cameron, leading to a very suspenseful scene. What would Cameron have done if John didn't intervene? We are starting to see some real character development from a character that we thought was programmed to protect John and nothing else. She appears to be learning more and more behind the unknown logic that can dictate human decisions: emotions. Between wanting John to help her, and then giving John the locket that could destroy her, Cameron is becoming a more interesting character that I hope gets more attention in upcoming episodes.
The sexual tension is still there between Cameron and John, and I am wondering how long it will be until we see something on that end. With the Sarah going crazy arc over for now, hopefully they will go down the Cameron/John's relationship route. This episode put the show back on track for the rest of the season. I only hope that the show makes it to a third season, because I think things are getting set up very nicely for some crazy robot action.