S1, E2: The war on terror enters a new phase as homegrown lone wolves begin to strike in the United States; ISIS and other terrorist groups use the Internet to enlist and inspire individuals; white nationalists helm a new wave of domestic terror.

S1, E2: The war on terror enters a new phase as homegrown lone wolves begin to strike in the United States; ISIS and other terrorist groups use the Internet to enlist and inspire individuals; white nationalists helm a new wave of domestic terror.