'Pretty Little Liars,' Season 2, Episode 12, 'Over My Dead Body': TV Recap. Big Plot Points to Remember: It’s a pretty exciting mid season finale! We learn for a fact that Jason didn’t kill Ali. Garrett and Jenna were in on it, though. Ali might be alive! Detective Wilden is back and certain the girls are killers. Page 5 comes up again and again at the police station, as much of this episode takes place in flashback from the girls being interrogated to what led up to it.