NCIS Season 7 Episode 10

Kids illegally hacking a Christmas tree find USMC lieutenant Thom Ellis, frozen and skull smashed bizarrely, on a Muslim prayer mat. Although his father, retired marines colonel George Ellis, became a protestant reverend, Thom converted to Islam during the Iraq war. That caused serious tension in his unit and his family, which includes younger brother Pat and widow Tina, who had an adulterous affair. Someone arranged for Roughnecks to get violent. Meanwhile Ducky helps Gibbs find out why his dad really visits 'for Christmas', Tony and McGee have a hard time doing Santa assignments.