An image of the late Cory Monteith is pictured on screen at the Teen Choice Awards as a tribute at the Gibson Amphitheater. (John Shearer/Invision/AP)

In conjuction with World Mental Health Day, MTV airs one-hour special “Life Continued: Defeating Depression” (at 7 p.m.), produced by Rainn Wilson’s company, SoulPancake. The documentary profiles two young people who struggled with mental-health issues and have been in recovery.

Judges Simon Cowell, Demi Lovato, Kelly Rowland and Paulina Rubio decide who continues in the competition on “The X Factor” (Fox at 8) as the remaining singers face off to win a spot in the Top 16.

Kristen Bell returns to “Parks and Recreation” (NBC at 8) playing a snooty councilwoman, as Leslie pairs up all the Pawnee staff with their Eagleton counterparts for a project.

Even if you’re not a fan of the show, get the tissues ready for Thursday’s episode of “Glee” (Fox at 9), as the show pays tribute to star Cory Monteith, 31, who died this summer of an accidental overdose. The kids in the glee club bid farewell to quarterback Finn Hudson — according to reports, no cause of death will be given to the character — with tear-jerker tunes including James Taylor’s “Fire and Rain” and The Band Perry’s “If I Die Young.”

Mike is forced to work side by side with his arch enemy (guest star Anne Heche) when his boss hires her as a new NBC anchor on “The Michael J. Fox Show” (NBC at 9:30). Later, Leigh and Ian accidentally start a Twitter feud.

So, Olivia Pope’s relationship with her dad seems . . . strained. On “Scandal” (ABC at 10), flashbacks reveal why the father-daughter duo don’t get along; meanwhile, Olivia works to clear up the whole “the president has a mistress” story.

SERIES PREMIERE: New docu-series “Million Dollar Shoppers” (Lifetime at 10:30) goes into the world of personal shopping for rich people, as the show follows shoppers trying to find the ideal wardrobe for their picky clients, starting with a mother-daughter duo.

Animal expert Jack Hanna and actor Kunal Nayyar are on “Late Show With David Letterman” (CBS at 11:35).

“The Tonight Show With Jay Leno” (NBC at 11:35) hosts actress Lauren Graham, TV host Chris Matthews and musical guest Tom Odell.

Actor Owen Wilson is on “Jimmy Kimmel Live” (ABC at 11:35), along with Los Angeles Clippers stars Chris Paul, Blake Griffin and DeAndre Jordan; plus, a performance from Panic! At the Disco.

— Emily Yahr