Julie learns from Nikki that another person has been attacked in the same way Julie was 7 years earlier. Jack suggests that the family move away so Camille can have a fresh start. Peter learns that Lena has seen Simon and seeks him out. Lena becomes concerned about a growing wound on her back. Tony Darrow find his brother Adam, another person like Camille and Simon.moreless
Stephen is still walking a fine line with his ULTRA partner Hillary who continues to question his loyalties.
When ULTRA and The Tomorrow People both learn of a breakout using her powers to benefit humans both sides seek her out to join their cause.
Meanwhile Morgan takes a risk and betrays Jedikiah's trust to help The Tomorrow People but Jedikiah learns something from her that is an even bigger surprise.
Julian returns with a vengeance but when he's caught by ULTRA he is forced to strike a deal that could cost him and Stephen their lives.
John disobeys Cara's orders again when he learns Julian has discovered the location of The Tomorrow People's lair.
Meanwhile still plagued by nightmares from her near death experience Astrid turns to John for comfort and support.
After receiving some shocking news Stephen attempts to restore order in both his worlds by striking a deal with Jedikiah.
Cara and Russell contend with a new break-out and must also deal with an ULTRA trap.
Meanwhile Jedikiah is closer to developing a secret technology that could change his future.
Stephen is upset with Jedikiah for going back on his word, forcing him to face The Founder.
In order to protect Astrid, Stephen must make a deal to bring in a powerful break-out and elsewhere John clashes with Cara which forces her to issue a harsh punishment.
Stephen feels uneasy about fellow ULTRA trainee, Hillary, who has her own secret agenda. After his mother insists the family go camping with Peter, Stephen asks John and Cara to ensure everything is okay with Astrid while he's gone.
Stephen and his fellow ULTRA trainees are given a test by Jedikiah to determine their worthiness as Agents but not everyone is happy to work as a team.
Cara is faced with a visitor from her past and John works with a new breakout while Russell is sent on a dangerous recon mission that could force a clash between different groups of Tomorrow People
Someone from Aidan's past threatens to derail his relationship with Kat just as they are taking things to the next level; and Sally uses her newly acquired powers to try to free Josh from his wolf, but there are unintended consequences.moreless
When John finds himself in a dangerous situation Stephen finds he is unable to help without revealing his duplicity to ULTRA. Also not satisfied with the answer he discovered about his father's death Stephen decides to take drastic action to find the truth with help from his fellow Tomorrow People.
Cara and Russell negotiate a trade with Jedikiah which ultimately makes Jedikiah take a big risk.
Stephen is determined to uncover what he hopes is the key to finding his father, and crafts a plan with The Tomorrow People that involves getting inside Jedikiah’s head. Meanwhile, Cara and Russell encounter an uninvited visitor in the subway tunnel base.
Stephen takes a risky opportunity and snoops around ULTRA.
After Stephen decides to have some fun with his newfound powers, Jedikiah takes extreme measures to ensure it doesn't happen again.
John feels tension between himself and Cara after he and Russell return from their trip while Stephen decides to try and handle a dangerous new breakout on his own but finds himself in over his head and needing help from his fellow Tomorrow People.
Stephen becomes even more determined to find out what happened to his father after having a moment of clarity about him.
Stephen and Russell head out for a night of fun only to run into a potential new breakout. They report back to John and Cara about the discovery but want to keep a low profile from ULTRA.
Russell learns of his father's death and struggles with the decision of whether or not to return home. John volunteers to go with him to keep him out of trouble.
Meanwhile Jedikiah has a secret that could destroy his career.
After Stephen breaks ULTRA protocol during a training exercise, Jedikiah's mysterious boss insists on meeting him. After learning Jedikiah is unable to help him Stephen turns to John who is only interested for selfish reasons.
Elsewhere Cara and John disagree on a dangerous plan when some of The Tomorrow People become desperate to attend a party in the outside world. And when Stephen again bails on plans with Astrid she decides to find out what he is really up to.
When ULTRA's most wanted man Killian McCrane resurfaces after years in hiding Stephen enlists John's help in tracking him down. John agrees but changes his mind when he learn Killian isn't after Jedikiah as everyone first believed.
Stephen still wants to help but Cara explains the history between Killian and John: A history that brings back memories from John's past and forces him to do something he never thought he would ever do again.
Meanwhile Stephen's mom becomes suspicious of his whereabouts and activities placing him in an awkward position.
When Stephen is convinced by Astrid to attend a party he is shocked to discover one of his classmates is in trouble, he reaches out to John and Cara for help but they refuse to come to his aide because they don't help humans. Stephen must deal with feelings from his own traumatic past when he tries to secretly get Cara to help anyway.
With Stephen now working at ULTRA, John gives him a mission to infiltrate their computer to give The Tomorrow People an advantage in finding new break-outs.
Stephen looks to his fellow Tomorrow People for help when ultra attempts to scan his brain. John refuses to help forcing Cara to help Stephen secretly.
ULTRA and Stephen both search for a new break out who is using his powers to commit crimes. when an ULTRA SWAT team arrives stephen again calls on John, Cara and Russell for help.
John attempts to convince Stephen to spy on ULTRA while continuing the search for his missing father.
When Stephen Jameson begins hearing voices and waking up in strange places he discovers he is a member of a highly evolved race of people with superhuman abilities. Seeking answers leads him to discover others of his kind called The Tomorrow People. He discovers The Tomorrow People are caught in a struggle for survival against an evil paramilitary group known as ULTRA who seek to destroy them all.
Stephen also learns there may be more to the mysterious disappearance of his father than he'd ever imagined and he discovers his own ties to Dr. Jedikiah Price, ULTRA's ruthless leader could be deadly.
Drone strikes against the militia threaten to destroy the budding relationships between Charlie and Jason, and Miles and Nora. Monroe's paranoia escalates after an attack on his life. Foster considers surrendering and Rachel and Aaron continue on their journey to restore power.moreless
Troubles befall Aaron on his journey with Rachel to the mysterious tower, and a woman form Monroe and Miles' past causes emotional havoc for the two.
Sally panics when her brother turns up. Aidan tries to make out that Kenny didn't see him in his vampire state and things seem to be looking up for Josh and Erin until the worst possible thing for the group happens.moreless
Eighteen months after the events in the season 2 finale, much has changed but much is still the same. Aidan, still buried underground and weakened from continuous hunger, starts having hallucinations of his friends and foes. As he gets rescued by an unknown man with unclear intentions, he soon meets a familiar face and learns the truth about the reality of today. Meanwhile, Josh and Nora have moved on after their battle with Ray, finding their lost friends however turns out to be harder than expected. Sally, on the other hand, continues to attempt escaping limbo, but the only way out is a risky move with unknown consequences.moreless
The team has to protect two Persons of Interest when the Machine gives them the numbers of a husband and wife.
In the mid-season finale, Miles and Monroe finally come face-to-face and Charlie encounters someone unexpected.
Nora and Miles make a run for it back to the Rebel camp while Aaron and Maggie search for Grace.