For the first time, a woman plays the Doctor. Meanwhile, three former U.S. secretaries of state give advice to ‘Madame Secretary” Tea Leoni in the series-five premiere.

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“Doctor Who”

Season 11 premiere of the sci-fi tale of an eccentric extraterrestrial Time Lord who zips through time and space to solve problems and battle injustice across the universe, traveling via the TARDIS (Time and Relative Dimensions in Space), an old and occasionally unreliable spaceship that resembles a blue police phone box, opens starring Jodie Whittaker as the first woman to portray the Doctor; the debut is the main feature of an all-day “Doctor Who” marathon, showing at 10:45 a.m., 12:30, 3, 5, 7, 9 and 11 p.m. Sunday; also including the “Doctor Who Ultimate Watch Party” celebration with interviews with Whittaker and Doctor Who fans and experts including Wil Wheaton, Travon Free and Alison Haislip at 4:30 and 10:30 p.m. Sunday on BBC America.

Also on Sunday

“Dancing With the Stars: Juniors,” 8 p.m. (KOMO): Premiere of spinoff of ABC’s longest-running competition series pairs 14 of the nation’s best ballroom dancers under age 14 with kiddie celebs, hosted by DWTS alums Jordan Fisher and Frankie Muniz, with judges Adam Rippon, Val Chmerkovskiy and Mandy Moore.

“Chesapeake Shores,” 9 p.m. (HALLMARK): Season-three finale; Abby must decide whether or not to break up with Trace; Bree’s relationship with Simon is rocked when Caroline appears; David and Jess must figure out their relationship without the B&B.

“The Walking Dead,” 9 p.m. (AMC): Season-nine premiere; Rick and his group make a risky run into Washington, D.C., to search for artifacts they will need to build the civilization he and Carl envisioned.

“Poldark on Masterpiece,” 9 p.m. (KCTS): The Poldarks are on a mission to restore their relationship, as Cornwall’s election approaches and difficult decisions must be made.

“Madam Secretary,” 10 p.m. (KIRO): Season-five premiere; Secretary of State Elizabeth McCord (Tea Leoni) turns to former Secretaries of State Hillary Clinton, Gen. Colin Powell and Madeleine Albright for advice on how to respond to a delicate situation.

“Shark Tank,” 10 p.m. (KOMO): Season 10 premiere; former contestant Jamie Siminoff, inventor of the Ring video doorbell, joins the biz-whiz panel evaluating entrepreneurs’ pitches.

“Star Wars Resistance,” 10 p.m. (DISNEY): Premiere of new animated series introducing new character Kazuda “Kaz” Xiono, a young pilot recruited by the Resistance for a mission against the First Order, with the return of fan-favorite characters Poe (voiced by live-action “Star Wars” star Oscar Isaac) and BB-8.

“Ballers,” 10 p.m. (HBO): Season-four finale of the sports-themed drama; retired NFL linebacker Spencer Strasmore (Dwayne Johnson) fights the NCAA, who he blames for his brother’s death.

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