For the third year in a row, three Utahns are among the 20 finalists on So You Think You Can Dance (7 p.m., Fox/Ch. 13).The trio are:-Tanisha Belnap, a 20-year-old ballroom dancer from Payson.-Brooklyn Fullmer, an 18-year-old Latin ballroom dancers from Provo.-Marcquet Hill, an 18-year-old ballroom dancer from South Jordan.The 20 finalists perform tonight; two will be eliminated in next week's episode.Elsewhere on TV ...Big Brother (7 p.m., CBS/Ch. 2): The Power of Veto competition is held.Taxi Brooklyn (9 p.m., NBC/Ch. 5): A handbag designer hires Cat to find her missing son.Duck Dynasty (11 p.m., A&E): Kay shops for burial plots.Hot In Cleveland (11 abd 11:30 p.m., TV Land): Elka uses Melanie to secure an endorsement; Elka thinks she's being haunted.