Joe E. Tata, who played Nat on the iconic show, has passed. Joe was suffering from Alzheimer's since 2014.
Fellow castmate Ian Ziering posted his remembrance ... "Joey was truly an OG, I remember seeing him on the Rockford files with James Garner years before we worked together on 90210. He was often one of the background villains in the original Batman series. One of the happiest people I’ve ever worked with, he was as generous with his wisdom as he was with his kindness."
Joe was in 238 episodes of "90210." He also appeared occasionally on the reboot of the show.
As for his other credits, they are numerous ... "Magnum P.I.," "The Rockford Files," "Hill Street Blues," "Batman," and "The A-Team."