But CBS is taking a page from “Young Sheldon” with its latest spinoff “NCIS: Origins.” Or as audiences will be tempted to call it, “Young Gibbs.” Harmon (who is an executive producer here) makes a brief return on screen to set the stage for a TV series that functions as one long flashback to 1991 when Gibbs joined the Naval Investigation Service (NIS as it was known back then) fresh out of the Marines and shortly after the murder of his wife and child.

"NCIS," for Naval Criminal Investigative Service, is a theoretically inexhaustible series about an elevated team of military police investigating cases involving military personnel; you might think that is too shallow a drawer to fill several series over many years,