Beckett and Castle will work as partners once again in the next episode of "Castle" season 8. But this time, Castle must practice speaking French.

According to the synopsis for episode 13 titled "And Justice for All," Beckett (Stana Katic) and the rest of the team from the 12^th Precinct will look into the case involving the death of an English as a Second Language student.

However, the team will have a hard time finding out the truth behind the murder, since the victim's class refuses to talk to the police. That is why they will need Castle's (Nathan Fillion) help. He will go undercover as a French-Canadian immigrant who will enroll in the class to get information about the victim's death. This will make Castle realize that there is a lot to learn about the victim's life than what he initially expected.

While the trailer for the upcoming episode shows that Castle will be struggling with his French accent, it also shows that his life will also be in danger before Beckett and the team find out who killed the victim.

In the trailer, Hayley (Toks Olagundoye) will point a gun at Castle, then shots are heard toward the end of the video. Are the gunshots aimed at Castle or is it still part of his undercover mission? Can Beckett rescue her husband right on time?

The episode will feature several guest stars, including former "The Mentalist" star David Michael Trevino who will portray the role of Eddie Ramirez, Arye Gross who will be reprising his role as M.E. Perlmutter, Sunkrish Bala who will portray the role of Vikram Singh, as well as JD Walsh who will appear as John Emerson.

"Castle" season 8 episode 13 is scheduled for airing on Monday, Feb. 29, on ABC.