Laura helps investigate a sailor's murder, and she uses the case to avoid celebrating her birthday. Meanwhile, Billy must team up with a hard-nosed naval investigator.
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 a dead CSI officer's prints are found at the scene of a bad guy's apparent murder, the team begins to suspect that a "guardian angel" has been acting to protect his loved ones from beyond the grave.moreless
Eric Matheson, a man accused of killing his wife, holds the Lightman Group hostage to get them to prove his innocence.
The BAU investigates a series of murders in Central California that appear to be connected to a killer who jumps trains and chooses his victims based on their proximity to the railway.