Primetime Preview: Season Finale of 24

While 24 ends it season seven countdown tonight, Jillian Harris starts to get busy on The Bachelorette...

• 8:00 p.m. The final week of performances begin on Dancing with the Stars (ABC); the season finale of Gossip Girl (CW); will Jack Bauer survive the 24 season finale (Fox)?
• 8:30 p.m. The fourth season finale of How I Met Your Mother (CBS).
• 9:00 p.m. Jillian looks for love on The Bachelorette (ABC); the sixth season finale of One Tree Hill (The CW); Mia returns on Two and a Half Men (CBS).
• 10:00 p.m. The seventh season finale of CSI: Miami (CBS).