Kiefer Sutherland Kiefer Sutherland

President Heller made the ultimate sacrifice on last week's 24: Live Another Day. But was it all for nothing?

Although Heller (William Devane) agreed to hand himself over to Margot Al-Harazi (Michelle Fairley) in order to prevent the terrorist's further drone attacks on London, Jack (Kiefer Sutherland) warned the president that Margot still might not stop. And based on the exclusive preview clip from Monday's episode (9/8c, Fox) below, Jack may have been right.

24 postmortem: Live Another Day bosses on the 200th episode's "sacrifice"