This episode has the highest rating of the series.
This is the 12th episode directed by Chad Lowe, who portrays Aria's dad - Byron Montgomery - on the show.
In the scene, where Alison is on the phone and the detective says, "The caller's in the house." This is a reference to "When a Stranger Calls".
The episode will start off right where the finale left off.
In season 6 there will be a time jump, where the girls come back from college.