https://screenrant.com/ncis-leroy-jethro-gibbs-return-confirm-set-up/

NCIS season 23 officially brought back Leroy Jethro Gibbs back. While it was largely a surprise, his homecoming was actually set up in 2019.

Gibbs’ NCIS Comeback Is Officially Dead — For Now (https://screenrant.com/ncis-season-24-gibbs-comeback-chances-dead/)

After Leroy Jethro Gibbs' first NCIS story in five years, CBS has officially killed any chance of his proper return in the foreseeable future.