At the beginning of the story, Eliot has a serious abrasion on his right cheek. A week later, it's completely healed with no evidence of damage.
Hardison is visible in the background as Irene and Luka run to their place while shooting the Howl Force movie, as Nate runs to the director chair. In the next scene Nate is running and sitting in director chair and Hardison is already sitting in the foreground.
Although the team are supposed to be in Serbia, they are driving a Dodge van. Dodge do not sell vans in Europe.
The Marine officer is a Captain. His cap has braid on the bill. The braid is reserved for the ranks of Major and above.
When Hardison pulls up info on Nicolas Obrovic, his height is shown as 5'9". However, the actor portraying him (David S. Lee is actually over 6'2".