Avilla

Avilla was a United States Navy sailor stationed aboard the Russian submarine Natalia during Day 5.

Day 5

Avilla was among the American crew who were working alongside the Russian naval crew on the Natalia. When CTU Los Angeles agents discovered that the Dawn Brigade terrorist leader Vladimir Bierko had targeted the submarine for its weapons, Jack Bauer contacted Lt. Southern and informed him of the threat. But Bierko shot and killed Southern before he could act and used the Sentox nerve gas to gas the sub, killing everyone aboard except one. Avilla was one of the first officers to succumb to the gas.