Who plays NCIS Inspector General Eugene Coyle on the NCIS cast? Tue Mar 16, 2021 at 4:51pm ET Actor Hugo Armstrong returns to the NCIS cast. Pic credit: CBS The NCIS cast sees the return of NCIS Inspector General Eugene Coyle on the latest episode of the show. We have seen Eugene Coyle on the show before, but the last time was in Season 11, Episode 16 when he was just playing an NCIS agent. This will become the third episode that Coyle has been a part of the NCIS cast, but he is popping up this time to enforce the law. As has been advertised in the promo and sneak peek for the new episode, Coyle is showing up to arrest Gibbs.