The opening quote told by Hotchener is similar to a quotation by Reid in the season four episode "Conflicted."
This is the third episode where the BAU has gone to another country to investigate a case. The first time was in the episode "Machismo," where the team went to Mexico, and the second time was in the two part episodes "To Hell" and "...And Back," where the team went to Canada.
The song heard during the closing montage is "Ancient Light" by Allman Brown.
Det. Rosenburg: (about Garcia) She has our entire I.T. department tasked with trying to take the picture down off the web. So like you probably already know...
Morgan: Well, the internet is forever.
A callback to the season five episode, "The Internet Is Forever".
Goof: Reid mentions the "Battle of Saint Scholastica Day" saying it occurred in 1335 and lasted two days. In reality the "St. Scholastica Day Riot" occurred on February 10, 1355 and did (indeed) last two days. In 1335 various scholars left Oxford, as they felt the city was unacceptable for various reasons, including the heat. The two day riot, though, wasn't until 1355. While this could be a simple typo, the real SSA Reid wouldn't make such a goof (thus a double goof).
This episode is partly based on the Malaysia Airlines MH17 crash. Malayasia Airlines MH17 was shot down over Ukrainian airspace on July 17, 2014, killing all 298 souls on board.