The 2013 Billboard Music Awards
Tracy Morgan takes the stage at the MGM Grand Arena to host this year's star-studded awards ceremony featuring today's hottest chart toppers. The show features performances by music legend Prince, Taylor Swift, Justin Bieber and more. ABC/CTV, 7 p.m.
After the guys win the Springfield Lottery, Carl escapes to Iceland with all the cash. Homer, Lenny and Moe set out to get what's coming to them in this season finale. Later, the Simpsons travel through the galaxy to Kang and Kodos' home planet. Fox/Global, 7 p.m.
ACM Presents: Tim McGraw's Superstar Summer Night
Tim McGraw and his guests kick off the summer touring season with a two-hour concert featuring some of the biggest stars in country music. Performers include Faith Hill, John Fogerty, The Band Perry, Keith Urban and Lady Antebellum. CBS, 8 p.m.
Tom Selleck narrates this ambitious seven-part Discovery series, which examines the natural wonder of the continent we call home. Camera crews spent 2,830 days on location, during 250 separate expeditions, to capture more than 850 hours of footage. Discovery, 8 p.m.