Season 2 premiere, 8 p.m., CWNina Dobrev) gets a double dose of bad news when she finds her Uncle John’s bloody body and receives word of Jeremy’s fate. Meanwhile, Damon (Ian Somerhalder) discovers that Katherine has returned.
Season 1 finale, 9 p.m., ABCMissy Peregrym) thinks about quitting the force. Plus, Dov (Gregory Smith) learns the truth about his girlfriend and must decide between her and his job.
Series premiere, 9 p.m., CWMaggie Q) comes out of hiding to seek vengeance on the agency that trained and betrayed her.
9 p.m., HIST
9/11 State of EmergencyThis special program commemorates the anniversary of September 11, 2001 and recalls all of the split-second choices made on that day, from the emergency phone calls from everyday citizens to the top-secret decisions made by national leaders like Condoleezza Rice and Donald Rumsfeld.
11:30 p.m., COMEDYJohn Legend.
Also on the airwaves...
Big Brother, 8 p.m., CBS
The Real Housewives of Washington D.C, 9 p.m., BRAVO
Project Runway, 9 p.m., LIFETIME
Ace of Cakes, 10 p.m., FOOD
Jersey Shore, 10 p.m., MTV
NFL Football: Vikings v. Saints
College football: Auburn v. Mississippi State, Central Michigan v. Temple
ATP Tennis: U.S. Open Men’s quarterfinals, Mixed doubles final
What are you watching tonight?
Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom