'24' (Mon., 9PM ET on Fox) is ticking down to its series finale. As the show nears its conclusion, Jack Bauer (Kiefer Sutherland) is turning up the heat.

[Spoiler alert.]

Jack goes in pursuit of former President Charles Logan (Gregory Itzin) as part of his continuing quest to avenge the murder of Renee Walker. President Logan quickly learns that you really don't want to mess around with an enraged Jack Bauer. The special agent wears a frightening black mask and basically just completely terrifies the bad guys.

"That's Jack Bauer!" the President says, pointing at him in terror. Indeed it is. And he's out for blood.