Flashpoint (8pm, CBS) - A new recruit joins the team on Valentine's Day, which is notorious for hostage and suicide sitations.
Dateline (9pm, NBC) - In the second hour of this two-hour "Dateline," Keith Morrison explores the murder of Fort Bragg Army Special Operations officer David Shannon in Fayetteville in 2002.
Karaoke Battle USA (9pm, NBC) - The series premiere of a reality competition in which karaoke singers from across the nation compete to win a recording contract and a shot at the Karaoke World Championships. Tonight, contestants compete at the House of Blues in Las Vegas.
Whale Wars (9pm, Animal Planet) - In the Season 4 finale, Watson claims a major victory after 30 years of fighting, while he and the crew reaffirm their commitment to stopping the whaling fleet. At 10, Lisa Ling interviews Paul Watson and the other Sea Shepherds about the success of their 2010-11 campaign.
Strike Back (10pm, Cinemax) - A new series about an ex-Delta Force operative, Damien Scott, who teams up with a British antiterrorist unit to track down an international criminal. In the first episode, British sergeant Michael Stonebridge recruits help from Scott when an agent is kidnapped by a Pakistani terrorist. The two then uncover clues to a possible terrorist attack at a New Delhi hotel and race to foil it.
Haven (10pm, Syfy) - A wedding at an isolated estate turns deadly for the guests when the site becomes sealed off and something attacks from within.