After a relatively fun episode, the heroes will be back in action in “NCIS: Los Angeles” Season 11, episode 6. Preview videos show the case this week is about tracking down an arms dealer who has stolen a powerful weapon system that has to be recovered quickly.

A preview video of the next episode shows Callen (Chris O’Donnell) and Sam (LL Cool J) in tactical gear storming a warehouse. The team will have a hard time in tracking the arms dealer and the powerful weapons system he has stolen. Sam calls it a “nightmare” as their search of the warehouse and a car doesn’t result in any substantial clues.

In a desperate situation, Sam and Callen will have to team up with two former criminals from England. Ricky Dorsey (Vinnie Jones) and Frankie Bolton (Steve Valentine) will help the heroes to recover the weapons system.

A preview clip of “NCIS: Los Angeles” Season 11, episode 6 shows the interrogation of the two former criminals. Ricky and Frankie know about the stolen weapons system, but they will be reluctant to help the federal agents.

The two former criminals played a role in selling the stolen weapons system known as the Mayhem, but only because a criminal kidnapped Ricky’s daughter and forced him to help. Frankie arranged for the funds to help close the deal, which was supposed to be exchanged for the girl before the federal agents interfered.

The team will go undercover in the next episode to not only locate the Mayhem weapons system, but also help save the life of an innocent girl who gets caught up in it. Another scene from the next episode shows the federal agents assuming new identities to go to a gambling establishment in a mansion.

“NCIS: Los Angeles” Season 11, episode 6 is titled “A Bloody Brilliant Plan.” The episodes airs on Nov. 3 at 9 p.m. EDT on CBS.

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