NCIS: Los Angeles spoilers follow.
Tunell, who has worked on the NCIS spin-off since 2009, took to Twitter to share a first-look picture of a poor-lit room in what appears to be an abandoned laboratory. On the floor, you can see a trap door covered by wooden boards.
"Scouting creepy locations for the third episode of [NCIS: LA]," Tunell wrote, revealing in which episode viewers will get to know what the spine-chilling location is all about.
In May, the LA-set spin-off has aired its 13th season finale in which all characters got to have their (temporary?) happy ending.
Callen's (Chris O'Donnell) identity thief was named as Katya Vitkoya (Sasha Clements). After being able to solve the deep fake mystery, the Special Agent proposed to his longtime girlfriend Anna Kolcheck (Bar Paly).
Meanwhile, married couple Kensi Blye (Daniela Ruah) and Marty Deeks (Eric Christian Olsen) were finally given the chance to start a family together. The pair, who had previously considered fostering, welcomed teenager Rosa (Natalia Del Riego) into their lives.
LL Cool J's character Sam Hanna also took a big decision by selling his boat to stay closer to his father, who is living with dementia.
It looks like the stakes are high for the protagonists, who will have to protect their happiness at all cost in the upcoming chapter.