Garrett gives the biographic information of the initial murder victim Malik Said as attending ROTC in college and serving in the Army for two years until honorably discharged with an injury. At the same time, a service photo of Said in uniform shows him as a one-stripe private wearing a shoulder patch of the 11th Armored Cavalry Regiment, a Regular Army unit; he should have been a second lieutenant, or if he had attended ROTC without actually completing college, at the very least a private first class (one stripe and one rocker).
When discussing the first murder, Jack says "The gas could be an indication that our unsub wants his victims to suffer, getting off on the visceral brutality of watching them boil alive." However, at this point there is only one known victim still. It is only after arriving in Cairo later, that Jack is informed about the criminal being possibly serial.
While discussing Cairo's Khan el-Khalili market, Jack says "'Wow'... yeah. That's exactly what the ancient Romans said when they saw it around 100 A.D." Cairo was founded in 969 A.D.; its predecessor, Fustat, was founded in 641 A.D.