Q: Will “The X-Files” continue beyond its season that’s on the air now?

— John Fleming, via e-mail

A: That’s a good question, and one that might seem to have an answer now, though nothing is rock-solid yet. Gillian Anderson has said the current Fox round of the show will be her last, adding that she didn’t expect to go beyond the last one as Dana Scully. In turn, creator and executive producer Chris Carter maintains that he wouldn’t want to do a version of “The X-Files” that didn’t include Scully.

Compounding matters is what David Duchovny told us recently, that he would believe the franchise really had reached its end only if Carter killed off Mulder or Scully or both. As the actor put it, the saga inherently remains open-ended until that happens. Time will tell, then, though Fox co-chief Dana Walden has reasoned that there would be no more “X-Files” without Carter and Anderson’s participation.

Q: I’ve been hearing that there’s going to be a television version of “Jesus Christ Superstar.” When will that be on?

— Julie Hare, Columbus, Ohio

A: NBC is planning to air a live telecast of the rock opera on Easter Sunday, April 1. Officially titled “Jesus Christ Superstar Live in Concert!,” the production will be staged before an on-site audience in Brooklyn, N.Y., with original composers Andrew Lloyd Webber and Tim Rice among the executive producers.

The cast still is being assembled, but some impressive names from the music world have been enlisted so far. John Legend will have the title role, with Alice Cooper portraying King Herod. The part of Mary Magdalene — encompassing the song standard “I Don’t Know How to Love Him” — will be performed by Sara Bareilles, who has added acting to her resume with her work in the Broadway-music version of “Waitress,” for which she also wrote the score.

Q: Is “The 100” coming back? I thought it was renewed for another season,

— Tim May, Providence, R.I.

A: It was. The sci-fi drama is set to begin its fifth CW season April 24, paired on Tuesdays with “The Flash” after the new “Black Lightning” completes its freshman season on that night a week earlier.

Q: Please settle a debate. Did Buddy Ebsen do any other television series besides “The Beverly Hillbillies” and “Barnaby Jones”?

— Fran Tate, Bend, Ore.

A: The veteran actor did lots of television in its early years as a guest star, with credits from “Rawhide” and “Maverick” to “The Andy Griffith Show” and “The Twilight Zone,” but only twice more did he do jobs that made him a series regular.

The first technically wasn’t a full-fledged series, but he played George Russel to Fess Parker’s Davy Crockett in several adventures that were parts of the mid-1950s anthology “Disneyland.” Three decades after that, Ebsen had his last continuing series role as the title character’s fellow-sleuth uncle Roy on “Matt Houston.”

Q: Will “Trial and Error,” with John Lithgow, be coming back?

— Joanne Kramer, Reading, Pa.

A: The NBC comedy will return for a second season, but no premiere date had been set at the time of this writing … and it also was a question how much Lithgow would be in it. The main story will deal with a new murder suspect, but Lithgow may return as Larry Henderson, who would have ties to the show’s next person standing trial for homicide.

Lithgow had only a one-season deal for “Trial and Error,” but the other regulars — including Nicholas D’Agosto and Jayma Mays — are expected back.

Q: I saw “Beyond the Poseidon Adventure” on cable not long ago, and a young actor in the cast looked like Mark Harmon. Was it?

— Donna Holt, via e-mail

A: It was. He played an elevator operator who went along with other survivors after the overturned ship was boarded by a salvage team in the 1979 sequel to producer Irwin Allen’s huge 1972 disaster-movie hit. It was only Harmon’s second film — the first having been “Comes a Horseman” a year earlier — but he had done a good amount of television work during the 1970s, encompassing such shows as “Laverne & Shirley,” “The Love Boat” and “Police Woman” as well as the miniseries “Centennial.”