Episode 301, "One Wrong Move"
SEASON 3, EPISODE 312 - Two brothers get caught up in a white supremacy group that is planning a terrorist attack on the city. Danny and his younger brother have been involved in a white hate group. Danny has started rethinking the group and the ideology. Furthermore, he has met a woman who is helping him to evolve in terms of his thinking. But unfortunately his brother Trent has become fully indoctrinated. At a meeting at the compound, Danny realizes that they are actually planning an attack on the city. He informs the police, and SRU is on the case. Once SRU breaks onto the compound, Trent and Danny are pulled into a full on fire fight. The fight leads us to a series of backpacks that are headed into the city to hit an immigration swearing in ceremony.