JAG actually began the universe that would come to include multiple NCIS installments back in 1995, and one JAG actor reprised his role for the first time since 2005 in the penultimate episode of NCIS: LA Season 10.
The NCIS franchise is no stranger to crossovers between its three current shows, but NCIS: Los Angeles had something special in store for fans who have been watching since the very beginning.
David James Elliott was back as Harm, and the numbers are in for how many people tuned in.