NCIS: Los Angeles' investigators will have to suss out the man behind and anthrax plot during season 6.

When Will Deeks' Past Be Explored On 'NCIS: LA'? Eric Christian Olsen Teases Future Stories

The CBS drama is currently on winter hiatus, but Hetty's (Linda Hunt) team will have their hands full following their Jan. 5 return. Titled "Black Wind" and directed by Dennis Smith ("Black Budget," "Praesidium"), episode 14 will see Callen (Chris O'Donnell) and Co. take down another terrorist threat.

"I've been so silent! I've been so busy!" Smith tweeted in mid-December. "Today was Guns, helicopter's, Anthrax, terrorists and luckily a #NCISLA supportive cast and crew."

Callen Held At Gun Point In 'NCIS: LA' Sneak Peek, How Many Enemies Will Appear In 'Spiral'?

Callen, Sam (LL Cool J), Kensi (Daniela Ruah), and Deeks (Eric Christian Olsen) won't handle the upcoming case on their own. The Los Angeles team will get an extra set of eyes in the form of Special Agent Padla Fuentes (Angelique Cabral). Formerly on Enlisted, the actress can be seen hanging with the cast in the photo above.

"A lil' #bts photo shoot with these amazing actors. Had a blast this week!!!!" Cabral tweeted.

Find out more when NCIS: LA airs Mondays at 10 p.m. ET on CBS. Click the video below to see a sneak peek for the series' next episode, "Spiral."