3:00 p.m.-4:00 p.m. (E05)

As Jack deals with unforeseen circumstances, an unlikely duo joins forces to prevent an impending attack in London. Meanwhile, homegrown terrorist Margot Al-Harazi (guest star Michelle Fairley) reveals her demands – revenge for her husband's death in a U.S. airstrike. Also, President Heller (William Devane) orders a lockdown of military airspace, but it may be too late. (iTunes)