• Preview videos of "NCIS: Los Angeles" Season 11, episode 20 have been released
  • Sam and Callen will investigate one of FBI's cases
  • An FBI safe house will be attacked

Sam (LL Cool J) and Callen (Chris O’Donnell) will have to deal with a complicated case in “NCIS: Los Angeles” Season 11, episode 20. After Department of Justice asks the agents to get involved in case, the duo will watch an FBI safe house. An apparent arson attack will make the agents realize that the case is not as simple as it seems.

A preview video of the next episode that has been released online shows Sam and Callen investigating an arson case. According to the official plot synopsis, the FBI safe house was being used to protect a political activist who was seeking asylum, which makes this case about attempted murder.

FBI Agent Audrey Rush (Kate Orsini) will not want Sam and Callen to get involved in the beginning. However, she will soon realize that she needs help in cracking the case. Sam will be wary about the case because the initial information will not add up.

A sneak peek scene of “NCIS: Los Angeles” Season 11, episode 20 shows Sam and Callen discussing the arson attack with a fire department official. The hilarious interaction with the official shows the fire department will not call the incident arson until they finish their investigation.

Sam and Callen will be familiar with the FBI safe house before the attack. A scene from the next episode shows them waiting outside the house to explore their options. While agent Rush will slam them for following her to the location and jeopardizing the case, a sudden scream will force all of them to head in to investigate.

Meanwhile, Eric (Barrett Foa) will deal with the aftermath of Nell (Renée Felice Smith) leaving the team. A clip from the next episode shows a funny conversation between Eric and Deeks (Eric Christian Olsen).

“NCIS: Los Angeles” Season 11, episode 20 is titled “Knock Down.” It will be released on April 12 at 9 p.m. EDT on CBS.

NCIS Los Angeles
"NCIS: Los Angeles" Season 11 will change the lives of many characters. NCIS: Los Angeles/Facebook