Castle (Nathan Fillion) is about to go undercover in a way you've never seen him before on ABC's Castle.

Would 'Castle' Really Continue Without Its Main Characters?

ABC has released a new plot synopsis for episode 8.13, which is titled "And Justice For All." The synopsis states that Castle will go undercover as an immigrant.

"Beckett [Stana Katic] and the 12th Precinct look into the murder of an English as a Second Language student," the synopsis reads. "But when the victim's class won't talk to the police, Castle goes undercover as a French Canadian immigrant and learns that the victim was more than he seemed."

Will Rick's Missing Time Arc Conclude Soon On 'Castle'?

Guest stars for this episode include David Michael Trevino as Eddie Ramirez, Arye Gross as M.E. Perlmutter, Sunkrish Bala as Vikram Singh and JD Walsh as John Emerson.

Castle is coming off three episodes in eight days, with the midseason premiere airing Feb. 8, the next episode on Feb. 14 and the next episode on Feb. 15. This was due to ABC scheduling in another episode of Bachelor Live the week before, so now the show is back on track for the rest of the season.

Meanwhile, ABC announced today that entertainment president Paul Lee has resigned from his post, with Channing Dungey set to take over. It remains to be seen if this will greatly impact the future of Castle.

Castle airs Mondays at 10 p.m. ET/PT on ABC.

Watch the promo for the next episode of Castle here: