“NCIS: Los Angeles” Season 10, episode 21 will not be airing this weekend. The plot of the episode revolves around a fugitive. Callan (Chris O’Donnell) will be called in for questioning by a U.S. Marshall to help solve the case.

There are just four more episodes left in “NCIS: Los Angeles.” The title of the next episode is “The One That Got Away.” The plot of the episode will focus on Callan and Sam (LL Cool J) tracking down a fugitive before she kills someone or gets killed.

Perhaps the most highly anticipated event on the show this year, apart from the wedding, is the crossover with the “JAG” TV series. David James Elliot and Catherine Bell will be reprising their respective roles form the old show.

Elliot will reprise his role as Navy Captain Harmon Rabb Jr. first in episode 23. A first look picture of the character posted on Entertainment Weekly shows the actor coming back in full “JAG” uniform in “NCIS Los Angeles” Season 10.

Harmon’s involvement with the team will revolve around ISIS sympathizers who plan to attack U.S. aircraft carriers. The threat will force Harmon to work with Callan and Sam to stop the attack from happening.

Bell on the other hand will be reprising her role as Lt. Col. Sarah “Mac” MacKenzi in the finale episode, Entertainment Weekly reported. Executive producer R. Scott Gemmill said that Mac was a “strong, smart woman who held her own, and then some, in a male-dominated world.” He added that the character in “JAG” helped pave the way for more strong female leads.

The finale episode appears to be ambitious because the plot involves a “big case.” The team will have to collaborate with different agencies from different countries. Gemmil told TV Line that they are planning a “big confrontation in the Middle East.”

“NCIS: LOS Angeles” Season 10, episode 21 titled “The One That Got Away” will air on April 28 at 9 p.m. EDT on CBS Television Network.