Gary Cole most recently starred as Harrison Jackson III on ABC’s Black-ish spinoff Mixed-ish, which was cancelled after two seasons.
Law’s other credits include Arrow, the short-lived Training Day series and Spartacus: Blood and Sand.
As for Katrina Law’s Jessica Knight, she was introduced last season as a REACT (Regional Enforcement Action Capabilities Training Team) agent, but with her old team members dead and Knight having helped our main characters with their investigation in “Rule 91,” it’s easy to imagine that she’ll join the main team.
Since it doesn’t sound like Cole’s Alden Park will take over as team leader in Gibbs’ absence, it’s unclear if Park will transition from the FBI to a different position in NCIS early into Season 19 or if he’ll keep working for the FBI during the show, perhaps acting as a liaison between the two law enforcement agencies.