Best Bets on TV tonight

“Law & Order” (8 p.m., NBC): As if the Internet and a wretched economy haven’t proved lethal enough, they’re killing off a journalist on “Law & Order” tonight. Samantha Bee (”The Daily Show”) guest stars.

“Shark Tank” (9 p.m., ABC): It’s time to jump into the “Shark Tank” again as Mark Burnett’s ruthless business tycoons return to field more investment proposals. Do you smell blood?