...NCIS: Los Angeles Ended

https://screenrant.com/ncis-season-22-episode-18-hettys-disappearance-update-solved-explainer/

Hetty's disappearance in NCIS: Los Angeles has left a lot of questions unanswered but NCIS season 22 has started to answer them with their guest star.

NCIS Is Finally Answering Hetty’s Biggest Mystery After 5 Years (https://screenrant.com/ncis-season-23-sam-return-hetty-disappearance-answer/)

Half a decade since she was last seen, NCIS is finally starting to answer the lingering mystery about where Hetty Lange is and what she is doing.