Fans of the hit police procedural drama TV series from ABC "Castle" season 8 will get to see Rick (Nathan Fillion) brandishing his French in this week's brand-new episode. Meanwhile, he and Kate's (Stana Katic) investigation could put their lives in peril.

According to the synopsis shared over at The Futon Critic for the episode titled "And Justice For All," Beckett and the 12th Precinct will be called to look into a murder case that involves the death of a student in an English as A Second Language (ESL) class. Perhaps fearing for their own safety, the classmates of the victim choose to keep their mouth shut throughout the deliberation, which eventually frustrates Beckett and the other detectives.

To tackle the problem, the NYPD will be forced to let Castle pose as a French Canadian immigrant who is looking to learn the English language for survival's sake. This undercover mission will help Rick and the operatives learn more not only about the victim but also the whole class since they suspect that one of the ESL students could be the culprit of the crime.

The promo video for the episode reveals Rick greeting and introducing himself a room full of ESL students with his French phrase.

"Welcome to our English as A Second Language class," the teacher greets back Rick.

The clip also hints that the victim could have died due to snake bite. Scenes went on to feature a news report program bearing a headline that reads: "Murdered man found in pit of deadly snakes." At that point, Kate is shown looking quite a bit concerned while her husband appears to be interested in what has transpired.

The highlight reel then turns to suggest that there could be more to this case than what has been previously stated. In a video, a man that looks like an agent angrily confronts Rick and Beckett, asking them if they have any idea what they are going into. Could there be something big happening in the background? The last moment of the clip shows a woman aiming her gun at Rick. A shot is then heard.

"Castle" season 8 airs Mondays, at 10 p.m. on ABC.