The team finally cracks a member of Sandstorm, leading to a huge breakthrough in uncovering Phase Two.

After an abandoned baby is found with a tattoo identical to one of Jane's, the team races to piece together the child's identity and save dozens of infants. A furious Jane confronts Oscar about the outcome of his secret missions.

Weller searches for the truth within a heartbreaking and confounding assertion. Jane reaches out to a former suspect for help with Oscar. Meanwhile, the rest of the team struggles to help a friend...

After Jane discovers that Sandstorm is gearing up for an imminent attack, she risks everything to send a secret SOS to her FBI team.

In the thrilling mid-season finale the team goes after a group of sleeper spies that have just been activated and race to stop a slew of assassinations.

After escaping from CIA custody, the team recaptures Jane and convinces her to become a triple-agent within her old terrorist organization where she unlocks some major secrets from her past, while recent betrayals from both sides threaten to tear her and the team apart for good.

Jane and Weller hunt Roman back to where it all started and attempt to stop him.

The team scrambles to get ahead of Madeline and Ivy as they close in on the bunker's location, but someone on the inside is feeding Madeline information. As her plan takes shape, the team may be forced to take desperate measures.

With the surviving members of the team captured and held in FBI custody, Madeline and Ivy are in the final stages of their plan, but a few unlikely allies come out from the woodwork, trying to stop her before it's too late.

Jane and Weller go undercover as a world-class assassin couple to prevent deadly information from getting into the wrong hands. The intimate assignment draws them closer than ever. Meanwhile, David embarks on a solo mission to win Patterson back, and Carter clashes with Mayfair over how to handle a dangerous individual.

As the FBI copes with a tragedy, Weller finds himself at the center of a surprising event. Jane faces an uncertain future.

As the team works together to take down a foe, Jane and Weller face a toxic secret that threatens to tear them apart.

When Patterson's investigation into a tattoo results in a horrible incident, she tries to figure out what went wrong - but quickly realizes all is not as it seems.

In order to capture a dangerous international criminal, Jane and Weller are forced to collaborate with the only person he will meet: their former target, Rich DotCom. Jane must decide whether to risk hurting Weller by executing a morally questionable order from Oscar.

The FBI is locked down when criminal hackers infiltrate the building, trapping the team inside SIOC. As they fight their way out, the close quarters force Mayfair, Zapata, Reade, and Sarah to confront personal conflicts.

Rich Dotcom returns to the FBI when he needs help with a pressing issue.

The FBI team and Avery attend a gala hosted by their target Hank Crawford in hopes of arresting him. Roman grows closer to the Crawfords.

A beautiful, naked amnesiac is found in Times Square covered in mysterious tattoos, including one bearing the name of FBI Agent Kurt Weller. Special Agent Weller and his FBI team must decode the map of clues on Jane Doe's body in order to thwart a deadly terrorist attack. Who is Jane Doe - is she an asset or enemy? Who wiped her memory? And who is behind the tattoos?

One of Jane's tattoos sends the team to a remote location where they find themselves face to face with a dangerous criminal in a case that puts Jane and Weller's strained relationship to the test and threatens to expose Mayfair's secrets. Meanwhile, Patterson breaks the rules to solve a tattoo puzzle.

Turn off your mind, relax and float down stream...it is not dying...it is not dying.

After a tip reveals there's a mole within the FBI's New York Office, the team must hunt for the operative while facing extreme scrutiny from Inspector Fischer. The team's deepest secrets threaten to be exposed, and everyone is a potential suspect - but some, especially Jane Doe have more to hide.

Roman's clues lead to a billionaire hypochondriac with stem cells that could cure Jane, who is now on her deathbed. Patterson and Rich offer to trade the Book of Secrets for the stem cells -- but first they'll have to get it.

The team sets out on an international mission to stop an attack from spreading. Madeline attempts to turn the tables as internal conflict threatens relationships within the team.

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 receives a visit - and an ambiguous warning - from the mysterious bearded man from her first memory as Weller and Mayfair struggle with Jane's role on the team.

Patterson and her puzzle-expert boyfriend, David, decode a tattoo clue that sends the team to the Centers for Disease Control (CDC). While at the CDC, the team discovers a hidden message on Jane's body that uncovers a plot that could have catastrophic global consequences. Meanwhile, Jane and Weller grow closer.