Extreme Weight Loss (9 p.m., ABC) – The fifth season premiere of this weight loss series features twin brothers who get to meet professional basketball player heroes Kobe Bryant and Steve Nash, and then get to play 2-on-2 with Byron Scott and James Worthy at their six-month milestone.
Also on tonight . . .
America's Got Talent (8 p.m., NBC) – Season 10 begins with the first round of auditions.
Are You Smarter Than a 5th Grader? (8 p.m., Fox) – It’s the start of Season 4 of this game show, in which grade school students help adult contestants answer questions.
Younger (10 p.m., TV Land) – After a bedbug scare, Liza is forced to bunk with Josh and his roommates.
Frontline: Obama at War (10 p.m., UNC-TV) – In this report, military and diplomatic leaders examine some of the choices President Obama faces regarding the Islamic State and the civil war in Syria.
I Can Do That (10 p.m., NBC) – The Harlem Globetrotters and illusionists Penn & Teller are among the featured acts in the premiere of this new series.