Big Brother The unscripted series ends its 19th round with a two-hour season finale. Julie Chen hosts. 8 p.m. CBS
America's Got Talent Tyra Banks reveals the $1-million winner in the unscripted competition’s season finale. 8 p.m. NBC
MasterChef In the two-hour season finale, the three remaining chef-contestants are left to their own inventions and ingredients to prepare a three-course meal for judges Gordon Ramsay (also the show’s host), Christina Tosi, Aaron Sanchez and returning guest judge Joe Bastianich. 8 p.m. Fox
The Vietnam War “Resolve (January 1966-June 1967),” the fourth...