It is from this point forward that Person of Interest morphs from being a crime drama to being a Science Fiction series. According to Gizmodo, "This past Tuesday night saw the season finale of Person of Interest, a show that premiered in 2011 as basically just a high-concept vigilante show. By the time it ended, it had transformed into one of the best science fiction series ever broadcast."
The government official Daniel Casey is whistle blowing to is named Iain Banks, this is a homage to science fiction writer Iain M. Banks.
Banks wrote the Culture series which features a highly advanced artificial intelligence.
At the Nerdist Writers Panel in September 2014, Jonathan Nolan & Greg Plageman revealed that Lambert was originally scripted to die in the stand-off with Stanton at Strickland's office. It was even shot that way, but in the editing room, they re-cut it to ensure that he survived, because they enjoyed Julian Ovenden's performance.
About halfway through the episode there is a location called 'Van Brunt Post'. Neil Jackson, who plays Rick Dillinger in this episode, plays Abraham Van Brunt in Sleepy Hollow.
The end of the episode occurs on February 25, one week prior to the episode's original air date.