Stosh was a hacker working with Open Cell in London during Day 9. When Chloe O'Brian returned to Open Cell's base after being missing three days, Stosh and the others greeted her with relief and asked where she had been. Minutes later, Jack Bauer - who had broken her out of CIA custody - entered the facility and held Stosh and the others at gunpoint, demanding their help to locate former member Derrick Yates. While searching for him, Chell showed Stosh footage of a drone attack in Afghanistan, which was later discovered to have been Yates' doing. ("Day 9: 12:00pm-1:00pm")