Jane and Weller get help from a former target to hunt down a criminal in the upcoming episode 18, titled "One Begets Technique," of the first season of the crime drama "Blindspot."

According to its official synopsis, Jane (Jaimie Alexander) and Weller (Sullivan Stapleton) create an unlikely team with the FBI's ex-target as they work together to search for the threatening international criminal. Jane, on the other hand, has to make a difficult decision after she gets a suspicious order from Oscar (Francois Arnaud) that could put Weller at risk.

The promo trailer for "One Begets Technique" shows Allison (Trieste Dunn) accidentally watch Jane and Weller hugging each other. Afterward, Allison asks for some space between her and her ex-boyfriend Weller. She thinks that there is something going on with him and Jane, and she can't point out what it is. Then, Jane is seen looking at her childhood photos and she tells Oscar if he knows how hard everything has been for her. Tasha (Audrey Esparza) tells Edgar (Rob Brown) that she thinks Mayfair (Marianne Baptiste) knows something that she is not telling the team.

The action-packed clip further reveals that all the lies and the secrets are all building up to "the biggest twist of the season."

In other related news, the cast of the crime drama were present at the New York's Paley Center for Media last Monday to share some interesting things about the series.

Alexander shared how she takes care of her tattoo while shooting the finale. "We've started shooting the season finale, so I leave my neck tat on overnight and it stays pretty well," Alexander said, according to Variety. "On Mondays I put the neck on, and then whatever else we're wearing, and then I leave the neck on all week with little touchups with the tattoo pen, and then I reapply the arms daily."

"Blindspot" season 1 airs every Monday at 10 p.m. on NBC.