White House secrets are explored on the History channel, and a top shelter dog is chosen on the Hallmark channel.

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‘Elvis All-Star Tribute’

Music superstars from a variety of genres celebrate the 50th anniversary of Elvis Presley’s iconic 1968 television special that signaled his comeback to music after a seven-year stint in movies, with never-before-seen footage and interviews with the rock legend’s wife, Priscilla Presley, and performances and presentations hosted by Blake Shelton, scheduled to include Shawn Mendes, Carrie Underwood, John Legend, Ed Sheeran, Keith Urban, Post Malone, Josh Groban, Darius Rucker and more; 9 p.m. Sunday on KING.

Also on Sunday

“Supergirl,” 8 p.m. (KSTW): J’onn welcomes clients to his new office; Kara teams up with J’onn on an assignment, tying into Alex’s current investigation involving the villain Menagerie; Nia invites Brainy to her Valentine’s Day party.

“God Friended Me,” 8 p.m. (KIRO): Miles reconnects with his high-school baseball teammate, Cal, when he gets a friend suggestion for a promising young baseball player coached by Cal; Arthur feels territorial when the Diocese sends someone to mentor under him.

“The Simpsons,” 8 p.m. (KCPQ): Krusty reveals the untold story of his past in his movie “The Sands of Space”; while working as assistants on the movie, Bart and Lisa learn about the early years of their parents’ relationship.

“2019 American Rescue Dog Show,” 8 p.m. (HALLMARK): Shelter dogs of various breeds from across the country compete to become top dog; as part of a pet initiative to empty the shelters, dogs up for adoption in shelters across America are also featured.

“Counterpart,” 8 p.m. (STARZ): Season-two finale of sci-fi thriller about a parallel dimension; Mira’s looming threat forges some unlikely alliances.

“NCIS: Los Angeles,” 9 p.m. (KIRO): The team continues to search for a terrorist cell in Los Angeles; Callen and Sam remain trapped in a movie theater after multiple bombs have detonated and every exit is wired with explosives.

“Madam Secretary,” 10 p.m. (KIRO): When American missionaries become hostages abroad, Dalton must help Elizabeth secure their safe return home; Stevie takes over Russell’s social-media presence; Henry helps his niece prepare for deployment.

“The Secret History Of The White House,” 10 p.m. (HISTORY): The hidden history of the White House, using images, graphics and previously classified materials, including the mystery of a top-secret construction project outside the West Wing.

Madeline McKenzie: mmckenzie@seattletimes.com. Program times may vary depending on your cable provider or service.