8 p.m. on 2, 9, ‘‘Once Upon a Time’’ — Regina (Lana Parrilla) is accused of murdering a beloved fairy-tale character, but Emma (Jennifer Morrison) has a hunch she didn’t do it. In the fairy-tale realm, Snow White and Prince Charming (Ginnifer Goodwin, Josh Dallas) plan the public execution of the Evil Queen (Parrilla) in the new episode ‘‘The Cricket Game.’’
8 p.m. on 7, ‘‘Secrets of Highclere Castle’’ — It may be more famous now than at any time in its 1,300-year history as the setting of ‘‘Downton Abbey,’’ but England’s Highclere Castle has its own stories to tell. This new special looks at how its former inhabitants lived and how its current residents — Lord and Lady Carnarvon — spend $1 million in annual upkeep funds.
9 p.m. on 2, 9, ‘‘Revenge’’ — As Emily (Emily VanCamp) locks in on a new target, Victoria (Madeleine Stowe) gets to work on a scheme that will involve her. Declan (Connor Paolo) makes a discovery that threatens the Stowaway’s future in the new episode ‘‘Power.’’ Gabriel Mann also stars.
9 p.m. on 5, 8, ‘‘The Biggest Loser’’ — This season premiere introduces audiences to 15 determined adults and three inspiring kids who are committed to getting healthy and changing their lives. Season 14 marks the first time the show has featured youngsters, as it aims to take on child obesity with the addition of childhood obesity expert and pediatrician Dr. Joanna Dolgoff.
9 p.m. on FOOD, ‘‘Rachael vs. Guy Celebrity Cook-Off’’ — The series moves to the West Coast for its second season as Rachael Ray and Guy Fieri welcome a new crop of celebrities hoping to parlay their cooking skills into some cash for charity. This season’s contestants include comedian Gilbert Gottfried, actress Kathy Najimy, singer Carnie Wilson, figure skater Johnny Weir and singer Chilli of TLC. In the opener, the teams are tasked with creating a menu and performing a skit for dinner theater patrons.
9 p.m. on LIFE, Movie: ‘‘An Amish Murder’’ — This twisty new mystery, based on Linda Castillo’s best-selling novel ‘‘Sworn to Silence,’’ features ‘‘Party of Five’’ favorite Neve Campbell as an Amish exile from a tiny Ohio town who comes back home as its chief of police and finds herself embroiled in a gruesome serial murder case that dredges up horrific memories from her youth. C. Thomas Howell, IronE Singleton (‘‘The Walking Dead’’) and Campbell’s real-life brother Christian co-star.