AOL Television counts down the greatest "nailbiters" of all time.
20. Sylar Traps Peter, 'Heroes'
19. Cons Run for Their Lives, 'Prison Break'
18. J.D. May Be a Dad, 'Scrubs'
17. Vaughn Isn't Vaughn, 'Alias'
16. The Chinese Kidnap Jack Bauer, '24'
15. Gunmen Fire on Bartlet And Staff, 'The West Wing'
14. Jim Kisses Pam, 'The Office'
13. The Carver Slashes Christian, 'Nip/Tuck'
12. The Others Steal Walt, 'Lost'
11. Revolutionaries Target Royal Wedding, 'Dynasty'
10. A Cylon Shoots Commander Adama, 'Battlestar Galactica'
9. McDreamy Is McMarried, 'Grey's Anatomy'
8. Who Shot Peter Campbell?, 'Soap'
7. Palmer Is Poisoned, '24'
6. Who Shot Mr. Burns?, 'The Simpsons'
5. Ross Says the Wrong Name, 'Friends'
4. Buffy Dies, 'Buffy the Vampire Slayer'
3. Picard Becomes a Borg, 'Star Trek: The Next Generation'
2. Sydney Wakes Up Two Years Later, 'Alias'
1. Who Shot J.R.?, 'Dallas'
Link w/ episode descriptions