Ivan Erwich looks for ways to activate the Sentox nerve gas canisters. Meanwhile, Jack Bauer finds a connection to the terrorists, but his connection has problems of his own. Charles Logan, Mike Novick and Martha Logan discuss the best way to handle the Walt Cummings situation. Finally, Lynn McGill has personal problems that draw him away from work, while Chloe O'Brian is forced to work with Spenser Wolff again.