When Bones says she has been to 74 interrogations, it fits into the series well, considering this is the 74th episode.
Blue flames on the body, supposedly indicating diatomic gas burning. The elements forming diatomic gas at standard temp and pressure are hydrogen, oxygen, nitrogen, fluorine, and chlorine... of which only hydrogen would make such flames. However such blue flames are also consistent with burning methane, ethane, methanol, ethanol, acetylene and many more chemicals.
Booth drives an Audi R8 in this episode.
When Booth is questioning Buddy in the car, Buddy waves his left hand with a ring indicating he is married. Traditionally people from India wear wedding rings on their right hand instead of their left. However it is not uncommon for modern Indians to wear a wedding ring on the left hand to match customs in countries like the US.