The prequel follows Gibbs' early days at NIS.

Plus, how Gibbs came up with Rule 13.

Plus, Randy books a slot at the Laugh Lodge ... only to be bumped by another redhead comedian.

The Season 23 finale airs May 12.

Series stars LL COOL J and Scott Caan.

Plus, why Katrina Law wants to cross paths with Scott Caan on the new 'New York' spinoff.

Yael Grobglas guest stars.

Plus, trouble's coming for NIS.

Plus, does Gary still have a future at NIS after being stabbed on the job?

Plus, the team's not forgetting Vance even as they're moving on.