Goof: The map of Canada/Ontario is incorrect. The map does not show the geographic outline on Canada, or the Ontario province.
Reid states once the unsub crosses the border, there's nothing but woods to hide what he's doing. This is incorrect. The majority of southwestern Ontario, outside of towns and cities, consists of farmland and fields.
This story was most likely based on the case of Canadian serial killer Robert "Willie" Pickton, who targeted women, many of them prostitutes, in British Columbia. Pickton was a pig farmer, and remains of his victims were found in pig feces on his farm. Pickton was convicted of six murders, charged with another 20, and allegedly confessed to 49 murders in total to undercover police officers. He was sentenced to life in prison, with no possibility of parole for 25 years.
The attack on the guard post at the border crossing would not have resulted in the involvement of the RCMP from the way the episode was filmed. It appeared as though William Hightower never actually crossed the Blue Water Bridge, which made his attack and arrest occur in Port Huron, Michigan, and not in Sarnia, Ontario, Canada.
The license tags on the car left by the unsub on the bank of the St. Clair River had the wrong tags for both Michigan and Ontario, Canada. Ontario generally has white tags with blue lettering on them and Michigan plates are a wide variety of color schemes, e.g., green and white, orange and pale blue sunset, or mainly white background with blue lettering. Also, license plates on the front and back of an automobile are not required in Michigan.
Although the Blue Water Bridge connecting Port Huron in Michigan and Sarnia in Ontario does make for a clean connection to the farmhouse, the Windsor Tunnel connecting Windsor and Detroit is much closer to where the abductions were taking place, thus making the extra 1-1/2 hour drive from Detroit to Port Huron unnecessary.
Reid's cell phone number includes the digits 1414, which can be seen when JJ presses these digits on the conference phone.
The entrance to the D.C. subway was substituted with an entrance to the New York City subway. Several of the subway station shots, before the final climax in the subway, are also New York City subway stations, and the shots of the train flying by the camera are also New York City subway trains. The final scenes appear to be shot in the Washington, D.C. system, which is much newer and has different train cars.
When Rossi takes the anthrax medication, he says "Cent'anni! May you live 100 years!". "Cent'anni" is Italian for "a hundred years" and is a common toast at birthdays in Italy. Also, the complete sentence is used by ChefMD on his show.
In the episode "52 Pickup," Agent Todd gets in trouble for lying to a civilian. However, in this episode, Prentiss is told that lying is a part of their job.
Both Dale Midkiff and Timothy Carhart guest-starred on the Lie to Me episode "Control Factor."
Although uncredited, writer Jay Beattie made an appearance in this episode as the man in the parking garage elevator who was unable to keep the door from closing.
The structure of the plane in this episode is slightly different from other episodes. Near the beginning of the episode, we were shown a view from the front left with JJ presenting the case. However, the seats where Morgan and Reid were sitting usually faced the other direction where the team would gather around the table with four seats and Penelope talking from the laptop placed on it.
Adam Jackson said he grew up "just across the bridge" in Corpus Christi. To be accurate, he would have lived in Brownsville, Los Fresnos, or San Benito. Corpus Christi is located 179 miles north of South Padre Island, and the drive takes approximately three hours and 45 minutes by car.
The young couple is killed after suffering two flat tires on a deserted-looking road surrounded by trees near a stop sign. This road is listed as Route 128 in Needham, Massachusetts. Route 128 in Needham is a major six-lane divided highway that connects a large part of the state.
In the scene where The Reaper is telling Ray Colson what to write, an orange strip on the barrel of the gun can be seen clearly, which indicates it as a prop gun and not a real one.
In the second murder scene, the Lanessas are driving a 2008 Toyota Camry. While trying to keep the killer out of the car, the wife cranks up her window. However, Camrys produced after 2007 have no manual window available.
Although referenced in this episode as a cathedral, Santiago de Compostela is not a cathedral. It a city located in the northwest of Spain in the Province of A Coruña that has a cathedral. There is a tomb in the cathedral that allegedly contains the remains of one of Jesus Christ's 12 Apostles, specifically St. James, son of Zebedee and brother of the Apostle St. John.
J.J. says that Father Silvano was "invited to say mass at the Washington National Cathedral," which would never happen because the Washington National Cathedral is Episcopalian, not Catholic.
At the very beginning of the episode when Prentiss drives up to the bar, the reflection of the neon "bar" sign on her car is not backward, as a reflection should be.