Guests will include Sean Murray, Wilmer Valderrama, Mariel Molino, Daniela Ruah, and more.

The prequel follows Gibbs' early days at NIS.

The long-running series is about to reach its 500th episode.

'We can't make it easy,' says Stowell.

An upcoming Season 2 episode will see Gibbs and Pride crossing paths again after an initial meeting years prior.

Plus, Lala's informant is shot and Franks' brother returns.

The upcoming episode of the prequel will also introduce the rest of the Fed Five.

Scott Bakula played the character for seven seasons of 'NCIS: New Orleans.'