'DRUNK HISTORY': Nick Kroll as Ronald Reagan and Lindsay Sloane as Nancy Reagan in the "Hollywood" episode. (Comedy Central/Comedy Central)

Jason Aldean, Dierks Bentley, Hunter Hayes, Brad Paisley, Band Perry, Miranda Lambert and Carrie Underwood perform on “CMA Music Festival: Country’s Night to Rock” (ABC at 8 p.m.), a highlight reel from the four-day festival that took place in Nashville in June. Little Big Town hosts.

Aria suspects Hanna of lying once she realizes how dangerous her drinking has become on “Pretty Little Liars” (ABC Family at 8), and Spencer discovers something troubling at her eye doctor’s office.

A stay-at-home mom competes against professional chefs who specialize in everything from barbecue to international cuisine on “Food Fighters” (NBC at 8).

The two-part Ken Burns documentary “Mark Twain” (WETA at 8) concludes with the “Adventures of Tom Sawyer” author perfectly content in 1885 before slipping into a downward spiral of debt, tragedy and lost faith.

SERIES PREMIERE: The premiere episode of “Celebrity Legacies” (Reelz at 10) celebrates the life and diverse career of James Gandolfini and analyzes how Hollywood dealt with his death.

RETURNING SHOW: “Hard Knocks: Training Camp With the Atlanta Falcons” (HBO at 10) opens the series’ ninth season with a one-hour spotlight on the Falcons’ training camp in Flowery Branch, Ga., with special access to the players’ and coaches’ meeting rooms, training rooms, living quarters and practice fields.

“Drunk History” (Comedy Central at 10) gets the Hollywood treatment with storylines involving Ronald Reagan, Orson Welles (played by Jack Black), William Randolph Hearst and Walt Disney.

An encore presentation of the “Frontline” special “Generation Like” (MPT and WETA at 10) explores how the perennial teen quest for identity has moved online and how big brands are increasingly moving their focus to young people as consumers.

Crackle, an online network owned by Sony, presents its latest series, “Sequestered,” a drama about a sequestered jury tasked with coming to a verdict in a high-profile kidnapping-murder case. It stars Jesse Bradford, Summer Glau and Patrick Warburton. The first six episodes are available to stream Tuesday, and the final six are scheduled to be released in October.

Actors Clive Owen and Nina Dobrev stop by “The Tonight Show Starring Jimmy Fallon” (NBC at 11:35), with musical guests the Head and the Heart.

Actor Colin Firth and comedian Tommy Johnagin come to the “Late Show With David Letterman” (CBS at 11:35), with music from St. Vincent.

Actors Ted Danson and Eva Green are on “Jimmy Kimmel Live” (ABC at 11:35), with musical guest Jake Owen.

Rachel Lubitz