Damon remembers the good old days living in New York City when he takes Elena to the Big Apple for a tour on “The Vampire Diaries” (CW at 8 p.m.), while Caroline and Stefan deal with Klaus as they search to find Silas.

SERIES PREMIERE: Ever just sit around with friends and toss out ideas about how the world is going to end? That’s the premise of new series “Forecasting the End” (Weather Channel at 9, 9:30), starting with the possibility of another planet crashing into Earth.

RETURNING SHOW: Jeff Foxworthy is back to host the second season of “The American Bible Challenge” (GSN at 9), quizzing contestants on Bible trivia.

The doctors suddenly realize that owning the hospital brings a unique set of problems on “Grey’s Anatomy” (ABC at 9), while Meredith frets for her unborn baby and Callie and Arizona try to reinvigorate their relationship.

It’s guilty pleasure song night on “Glee” (Fox at 9), as the members are tasked to perform tunes that they would usually be too embarrassed to admit they enjoy.

Contestants on “Project Runway” (Lifetime at 9) create springtime clothes that will be displayed in the front windows of upscale stores; guest judges are fashion figures Rachel Roy and Bonnie Brooks.

The first lady finds out that her stepson, Skip, is just one assignment away from graduating from college on “1600 Penn” (NBC at 9:30), so she makes it her mission to help him.

Fitz makes a decision for the Supreme Court opening on “Scandal” (ABC at 10), but it turns out that the person he chooses is having a torrid affair with a famous CEO — so Olivia’s on the case to help out. Meanwhile, Quinn and Huck get closer as he trains her in all sorts of shady activities.

A former beauty queen seeks help from the experts on the final season of “What Not to Wear” (TLC at 10), as she regularly covers her plus-size shape with baggy, loose-fitting clothes.

“The Tonight Show With Jay Leno” (NBC at 11:35) hosts actor Dwayne Johnson, basketball player Chris Paul and a performance by Atlas Genius.

Actress Ellen Pompeo is on “Jimmy Kimmel Live” (ABC at 11:35), along with racecar driver Brad Keselowski and musical guest Lianne La Havas.

News anchor Anderson Cooper, actress Thandie Newton and singer Brandi Carlile are guests on “Late Night With Jimmy Fallon” (NBC at 11:35).

Emily Yahr