• ‘NCIS’ Season 13 episode 21 is not airing on April 12: New airdate plus ‘Return to Sender’ plot details; Michael Weatherly replacement joins the cast?

‘NCIS’ Season 13 episode 21 is not airing on April 12: New airdate plus ‘Return to Sender’ plot details; Michael Weatherly replacement joins the cast? (Photo : Facebook/NCIS/CBS)

"NCIS" Season 13 episode 21 will not air this Tuesday. It seems the show will be going on a one-week hiatus before it returns for its another explosive segment.

Spoiler alert! This article contains spoilers for "NCIS" Season 13 episodes. Do not read further if you don't want to learn more about it.

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"NCIS" Season 13 episode 21 air date, spoilers

This week, CBS is not airing a new episode of "NCIS" Season 13. The show will resume its run next week on April 21 with the episode titled "Return to Sender."

In the highly anticipated instalment, Naval Criminal Investigative Services agents join hands with the FBI and Homeland Security for a new case. According to Spoiler TV's description for episode 21 of "NCIS" Season 13, two British prisoners are on the run and have reportedly managed to cross the international borders. One of the prisoners happens to be a former spy.

The fugitives manage to cross the border by hiding in a shipping container. So, Gibbs teams up with Senior FBI Agent T.C. Fornell to reach the prisoners.

At the same time, McGee will be busy with a personal task. He will be seen apartment hunting, which is not going to be an easy task for him. While he looks for a new house for himself, he tries to find out how DiNozzo managed to buy his house. Fans can expect to see episode 21 delve deeper into DiNozzo's storyline as McGee does some snooping on him.

In additional news, the "Law & Order: UK" actor Duane Henry has signed on to appear in the final two episodes of "NCIS" Season 13 ahead of Michael Weatherly's exit, according to TV Line. The actor who will play the role of Clayton Reeves, former MI-6 agent, might be seen as series regular in Season 14.

Rumours suggest that Weatherly will not be directly replaced. Several media outlets are speculating that Henry's character might fill in DiNozzo's place. Reeves has been described as "offbeat and fun with swagger to spare."

"NCIS" showrunner Gary Glasberg opened up about Henry's casting in "NCIS" Season 13. "We think we found something really special in Duane Henry. His unique blend of charm, heart and athletic physicality is going to be a great addition to the mix," Glasberg said in a statement.

"NCIS" Season 13 episode 21 airs April 19 at 8:00 pm on CBS. A promo video for "Return to Sender" is expected to be out soon and it will be uploaded as soon as it is made available by the network. So, stay tuned for updates and spoilers.