Arm in Arms is the twelfth episode of the sixth season. It was released on 15 January 2010.
The team searches for a lost shipment of high-caliber firearms when one of the weapons is responsible for random killings throughout the city. Also, Charlie and Amita disagree on a wedding date while Don re-evaluates his relationship with Robin.
[This appears on the beginning of the episode] 28 global armed conflicts 43 military governments 600 million automatic weapons 1,100 rounds per minute