Dallas (8 and 10 p.m., TNT) returns with the second half of Season 3 - or Season 17, depending on how you're counting.The Ewings are dealing with the aftermath of the fire at Southfork. Which, by the way, is the second time the house has caught on fire. That was the Season 6 cliffhanger way back in 1983.Elsewhere on TV ...Bachelor in Paradise (7 p.m., ABC/Ch. 4): Two more bachelorettes arrive. Because there aren't enough people hungry to be on TV on this show already.Running with Bear Grylls (7 p.m., NBC/Ch. 5): Tom Arnold and Bear explore the coastal mountains of Oregon.MasterChef (7 p.m., Fox/Ch. 13): The remaining eight contestants divide up into four two-person teams and cook chicken dishes.Whose Line Is It Anyway? (7 p.m., CW/Ch. 30): Jeff Davis is the guest.American Ninja Warrior (8 p.m., NBC/Ch. 5): The finalists tackle Stage 1.Hotel Hell (8 p.m., Fox/Ch. 13): Sibling rivalry is sinking a Minnesota hotel.America's Next Top Model (8 p.m., CW/Ch. 30): Season 21 begins with 31 guys and girls competing to see who can take the best selfie.Doctor Who: The Ultimate Time Lord (8 p.m., BBC America): A look at the phenomenon that is "Doctor Who."Under the Dome (9 p.m., CBS/Ch. 2): Barbie thinks his father knows more about the dome than he's willing to admit.Mistresses (9 p.m., ABC/Ch. 4): Karen receives a tempting offer from Jacob; Dom tries to turn the tables on Toni.Switched at Birth (9 p.m., ABC Family): In the third-season finale, Bay and Daphne's graduation day arrives, and surprising news about Carlton is revealed.Dick Cavett's Watergate (9 p.m., PBS/Ch. 7): A look back at the scandal that took down Richard Nixon.The Fosters (10 p.m., ABC Family): Connor deals with mounting pressure to dissolve his friendship with Jude.Partners (10 and 10:30 p.m., FX): Allen takes on an old rival in court; Marcus gets an unexpected message from his ex-wife.Captivated: The Trials of Pamela Smart (10 p.m., HBO): This documentary about the woman convicted of convincing teenage boys to kill her husband premiered at Sundance earlier this year. It's an advocacy piece that comes down on Smart's side. It does a pretty good job of questioning whether she got a fair trial, but it doesn't do nearly as good a job proving she didn't do it.Teen Wolf (11 p.m., MTV): An assassin targets Scott and Liam;, Lydia uncovers a family secret.