Dallas (7 and 8 p.m.; 9 and 10 p.m., TNT) kicks off its second season ... its 16th season with Christopher battling John Ross; Christopher battling Rebecca; Ann battling her ex-husband; J.R. battling Cliff, and so on and so on.It's all great fun.Elsewhere on TV ...The Biggest Loser (7 p.m., NBC/Ch. 5): A contestant faces some serious setbacks.Bones (7 p.m., Fox/Ch. 13): Two bodies are found at the same burial plot.The Carrie Diaries (7 p.m., CW/Ch. 30): Carrie snoops through Tom's files and finds shocking information about Sebastian.RuPaul's Drag Race (7 and 9 p.m., Logo): A new season of this drag-queen competition begins.NBA (7 p.m., ROOT): Houston Rockets at Utah JazzBeing Human (7 and 10 p.m., Syfy): Aidan and Henry search for clean blood.The Following (8 p.m., Fox/Ch. 13): Emma, Jacob and Paul hold Claire's son.90210 (8 p.m., CW/Ch. 30): Annie imagines what her life would be like if she'd never left Kansas.Lost Girl (8 and 11 p.m., Syfy): Kenzi and Lauren have to work together to save their Fae friends.Deception (9 p.m., NBC/Ch. 5): Joanna realizes that Julian is hiding something about Vivian's murder.Switched at Birth (9 and 11 p.m., ABC Family): Daphne tries to help Travis.Continuum (9 p.m. and midnight, Syfy): Bodies with holes drilled in their heads are showing up.Bunheads (10 p.m., ABC Family): Michelle's brother visits.