GREY'S ANATOMY: Cristina (pictured) imagines the two routes her life can take based on one upcoming critical decision she has to make. (Danny Feld/ABC)

The 18 remaining contestants on “Hell’s Kitchen” (Fox at 8 p.m.) compete in their first physical challenge, which has something to do with potatoes and pigs. In typical form, the winners get to luxuriate on a yacht while the losers are forced to wash the livestock from the challenge.

Jafar is still irrefutably the worst on “Once Upon a Time in Wonderland” (ABC at 8) when he gets the Knave to steal from Alice in the present day while still holding the Jabberwocky hostage.

Caroline and Enzo take a trip to Atlanta on “The Vampire Diaries” (CW at 8) to track down a recently revealed doppelganger, and while they’re there, Enzo drops a bomb about his past.

With Cristina in a tough spot on “Grey’s Anatomy” (ABC at 9), she tries to imagine her two different life scenarios after being faced with a very difficult decision.

During its new shrunken results show, “American Idol” (Fox at 9) will boot off one contestant, whittling down the group to eight, and have time for Janelle Monáe to perform her new single, “What is Love?,” in just 30 minutes.

SERIES PREMIERE: Reviewed by TV critic Hank Stuever on the next page, “Surviving Jack” (Fox at 9:30) stars Christopher Meloni as Jack Dunlevy, a father who goes from distant to taking a more-active role in the lives of his two teenage kids when his wife, Joanne, goes back to law school.

Fitz and Mellie’s kids accompany them to a TV interview at the White House while Rowan concerns himself with stopping Olivia’s investigation of B613 on “Scandal” (ABC at 10).

The notoriously brutal “Vikings” (History at 10) keeps up its reputation with Lagertha and Ragnar uniting to battle Jarl Borg.

The engaging documentary series “Chicagoland” (CNN at 10) shines a light on Mayor Rahm Emanuel’s effort to promote Chicago’s youth programs with the help of Common, Dwyane Wade and Magic Johnson.

Actor Russell Crowe and comedian Joan Rivers are on “The Tonight Show Starring Jimmy Fallon” (NBC at 11:35), with a musical performance from the National.

Olympic gold medalist Sage Kotsenburg and actress Kate Mara stop by the “Late Show With David Letterman” (CBS at 11:35), with music from Cole Swindell.

Actors Jason Bateman and Katie Lowes come to “Jimmy Kimmel Live” (ABC at 11:35), along with music from John Legend.

Rachel Lubitz