Watch online the mysteries behind Jane Doe's tattoos unravel in 'Blindspot' premiering on 21 September on NBC.NBC

"Blindspot" continues spilling out thrilling action with its third episode, to be aired on 5 October. The last two episode have already witnessed various elements unfurl on the NBC series, but the mystery, surprises and story get deeper in episode 3 titled "Eight Slim Grins."

CLICK HERE to watch "Blindspot" episode 3 titled "Eight Slim Grins" live online.

In episode 2, "A Stray Howl," the FBI team tested Jane's DNA (the results will be revealed in episode 3). The episode opened with Dr. Borden giving her a test, but the only memory Jane has is of doing target practice in the woods. Weller gives her more weapon training, hoping to revive her memory.

The last week's episode also saw how one of Jane's tattoos led the FBI to Major Arthur Gibson, a former drone pilot who had planned to blow the whistle on the project, but it was stopped out by the government, before he could. Gibson had kidnapped a little girl, in order to gain access to the drones. But Jane and Weller manage to save the little girl.

Meanwhile, Weller seemed to believe that Jane is Taylor Shaw, the little girl his father was accused of kidnapping and killing because of a scar on her neck.

The episode ended with Jane being grabbed by someone from behind --- the bearded man in her flashback.

The suspense continues in "Eight Slim Grins" when Jane learns that she has a same Navy Seal tattoo, as the recently-captured jewel thief. Going by the preview and synopsis of episode 3, it looks like viewers may get to meet someone from Jane's past, who has the same Navy Seal tattoo as her. In fact, Jane also gets a strange warning from this man she might know.

Meanwhile, Agent Weller and Mayfair will be seen having trouble figuring out Jane's role in the FBI team.

Official synopsis of "Eight Slim Grins" reads (via Cartermatt):

"An infamous crew of thieves almost pulls off the perfect jewel heist, except one thief – with a Navy SEAL tattoo identical to Jane's – is captured at the scene of the crime. Does this man know Jane? Meanwhile, Jane (Jaimie Alexander) receives a visit – and an ambiguous warning – from the mysterious bearded man from her first memory (guest star Johnny Whitworth) as Weller (Sullivan Stapleton) and Mayfair (Marianne Jean-Baptiste) struggle with Jane's role on the team."

"Blindspot" episode 3 titled "Eight Slim Grins" will be aired on NBC on 5 October, 10pm.