• Cast members (L-R) Michael Weatherly, Pauley Perrette, Rocky Carroll, Mark Harmon, Cote de Pablo and David McCallum participate in a panel for CBS series NCIS during the CBS sessions at the Television Critics Association winter press tour in Pasadena, Cal

Cast members (L-R) Michael Weatherly, Pauley Perrette, Rocky Carroll, Mark Harmon, Cote de Pablo and David McCallum participate in a panel for CBS series NCIS during the CBS sessions at the Television Critics Association winter press tour in Pasadena, Cal (Photo : REUTERS/Phil McCarten )

"NCIS" Season 12 is set to feature another action-packed segment on April 14, 2015. Episode 21 is titled "Lost in Translation" and focuses on the murder case of a Marine that unveils a terror group based in Afghanistan. Here are few spoilers for the next episode of "NCIS." Read on to find out what happens next.

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[Spoiler alert! This article contains NCIS updates. Do not read further if you don't want to know more about it.]

In Episode 20, Michael Weatherly's Tony DiNozzo and his girlfriend Zoe Keates, portrayed by Marisol Nichols, teamed up to solve the murder mystery of a marine. However, they realized the weapon of murder was used during an undercover ATF sting operation.

Episode 21 "Lost in Translation" will revolve around the murder case of another Marine in Washington D.C. According to the official synopsis (via Spoiler TV) for the upcoming "NCIS" Season 12, teases more danger than NCIS may have expected.

During their investigation of the murder, agents soon realize that they might not be looking for just one man, but they have to deal with a dangerous terrorist organisation. = Leroy Jethro Gibbs (Mark Harmon) and Eleanor Bishop (Emily Wickersham) take a trip to Afghanistan--the place where the terrorist group is located.

Meanwhile, the officers realise that the terror group has already captured their next target-another Marine officer. Gibbs and Bishop must reach on time to prevent the murder from happening.

Adding drama in the "NCIS" Season 12 Episode 21 are DiNozzo and Timothy McGee (Sean Murray). The last-aired episode focused on DiNozzo and his relationship with his father and his girlfriend. This week things will change a little bit and new situations test his association with people at work. DiNozzo is bound to be callous toward McGee when he learns that he is the new face of NCIS. The crime-fighting organisation will be represented by McGee on all the brochures being published this year.

In the latest promo video (as published on YouTube.com by TV Box Promos) for Episode 21, McGee can be seen in a leather jacket and sunglasses posing for the pictures as the model of NCIS. In the meantime, Bishop is put into a tough situation that forces her to face her greatest fears. Scroll down to watch the video.

Fans can take a glimpse of the events of the next instalment via photos published on Spoiler TV. Click here to view them. "NCIS" Season 12 Episode 21 "Lost in Translation" airs April 14, 2015 at 8:00 pm on CBS. Stay tuned for more spoilers and updates.