In the fourth-season premiere of Duck Dynasty (11 p.m., Discovery), the clan prepares for a 49th anniversary celebration for Phil and Kay.The title of the episode? "Till Duck Do Us Part," of course.Elsewhere on TV ...Big Brother (7 p.m., CBS/Ch. 2): The veto competition.Franklin & Bash (7 and 9 p.m., TNT): Infeld makes peace with an old foe. (Season finale)America's Got Talent (8 p.m., NBC/Ch. 5): Four acts advance to the next round.MasterChef (8 p.m., Fox/Ch. 13): The cooks must prepare a T-bone steak dish.Broadchurch (8 and 11 p.m., BBC America): The mystery around Danny Latimer's death deepens.Camp (9 p.m., NBC/Ch. 5): It's parents' weekend.Melissa & Joey (9 p.m., ABC Family): Joe and Mel make like burglars to retrieve an item that was mistakenly sold.Baby Daddy (9:30 p.m., ABC Family): Ben and Danny invite their father to Emma's baptism.Royal Pains (10 p.m., USA): Hank treats a florist who's having vivid dreams.Top Chef Masters (11 p.m., Bravo): The chefs have to create meals from leftovers.Futurama (11 p.m., Comedy Central): The crew seeks the meaning of a strange alien melody.The Bridge (11 p.m., FX): Marco uncovers Sonya and Hank's past.Necessary Roughness (11 p.m., USA): Dr. Dani treats a boxer.Hot In Cleveland (11 p.m. TV Land): Victoria's wedding planner arrives.The Exes (11:30 p.m., TV Land): Phil asks Eden to be his temporary assistant.The Soul Man (midnight, TV Land): Boyce hires former gang members as assistants.