Robert Wagner is set to return in the 301st episode of "NCIS" season 13 episode 19. Also, the episode is set to see Clayton as Tony's replacement.

"NCIS" season 13 episode 19 is entitled "Reasonable Doubts." According to Carter Matt, Wagner is expected to appear in the episode, since the 13th season of the series only has six episodes left. As per the publication, it is also assumed that the would be more returning characters in the upcoming episodes, in addition to the ones who had a major impact to Tony's life and exploits.

In other news, Clayton is also set to replace Tony in "NCIS" season 13 episode 19. According to TV Line, the former is one of the two agents who will allegedly take over Tony in the upcoming episodes. As per the publication, the character is described as someone who is in his late 20s to early 30s with a profound background in military.

Clayton is also a loud and opinionated man, who is usually disrespectful, short-tempered, sarcastic, and chauvinistic. As per the publication, no actor has been cast yet; however, rumors say that the show producers are in search of a British actor of African descent. It has beeen added that Clayton would debut on the series' season finale; thus, it is assumed that this character would be the core of a potential "NCIS" season 14.

In episode 19, the NCIS team is also set to identify the liar between the mistress or the wife, following the woman's accuse of each other about killing a Navy Public Affairs officer, as per Spoilers Guide. In addition, Wagner's Anthony DiNozzo, Sr. lends his hand to a homeless woman who thinks he is her father.

"NCIS" season 13 episode 19, "Reasonable Doubts," is set to air on Mar. 22.