New 24
You're referring to the new "24" series!
Yes, a new "24" series was announced in 2013, with Kiefer Sutherland reprising his role as Jack Bauer. The new series, titled "24: Live Another Day", premiered on May 5, 2014, on Fox.
The show consisted of 12 episodes and took place four years after the events of the original series. The story followed Jack Bauer as he was pulled back into the world of counter-terrorism to prevent a global catastrophe.
The show received generally positive reviews from critics and fans, with many praising Sutherland's performance and the show's ability to recapture the spirit of the original series.
In 2016, it was announced that a new "24" series was in development, titled "24: Legacy". The show premiered on February 5, 2017, and followed a new protagonist, Eric Carter (played by Corey Hawkins), a former Army Ranger who becomes embroiled in a terrorist plot.
Unfortunately, "24: Legacy" was cancelled after only 6 episodes due to low ratings.
In 2020, it was announced that a new "24" series was in development, titled "24: Reboot". The show is being produced by Howard Gordon and Manny Coto, who were both involved in the original series. The new series is expected to feature a new cast and storyline, while still maintaining the same fast-paced, action-packed style that fans of the original series have come to expect.
So, to answer your question, there is no "new 24" series currently airing, but there are plans for a new series in the works!