Christopher Pelant
9 episodes of Bones carry this thread, 9h in all — 6 of them are in The Essentials.
Arc membership is derived from each episode's own title and summary text. It shows where a thread is foregrounded, not every episode it touches.
In airing order
Evil tech genius Christopher Pelant, a suspect in a previous case Brennan and Booth handled, is back in court on appeal. Knowing what he is capable of, Brennan and Booth inform the judge that he is a suspect in two murder cases. Then, Brennan and Booth are called to the scene of a new murder. After determining the victim is Brennan's friend, who also is linked to Pelant, the Jeffersonian team works to prove he is guilty once and for all. But when law enforcement examines the team's findings, key pieces of evidence are tied to Brennan and suspicion falls on her.
Having been accused of murder, Brennan is on the run from the FBI, with help from her father Max. Booth and the Jeffersonian team are convinced evil tech genius Christopher Pelant has manipulated key evidence in the case to pinpoint Brennan as the prime suspect. Then, an anonymous tip leads the team to the remains of a high school guidance counselor that may hold the key to proving Brennan's innocence.
After Hodgins and Angela were drugged and woke up to a bloody corpse hanging in the canopy of their bed and flower petals around their son Michael's crib, they are forced to believe that Pelant is back for revenge against Hodgins. Although Hodgins wants to go after Pelant directly, Booth knows it's best to work within the system and not go against protocol. Meanwhile, as the Jeffersonian team investigates the corpse, they discover the victim was a Special Forces agent working for the world's biggest supplier of mercenaries, and Angela and Hodgins decide to start an investigation without the rest of the Jeffersonian team for the sake of their family.
When evil tech genius Christopher Pelant returns to toy with the Jeffersonian team in their newest investigation, they discover that the string of murders that have been occurring are tied to FBI agents close to Booth. Meanwhile, as the investigation unfolds, Sweets realizes that the evidence seems all too familiar to him and Brennan starts evaluating her relationship with Booth when signs begin to point to him as a potential target of Pelant's.
In the season premiere of BONES, the Jeffersonian team investigates the murder of Jason Siedel, an accountant for the state department, whose remains were found in a hotel air conditioning unit. When Booth finds his old army buddy and CIA agent, Danny Beck, clearing away evidence at the victim's condo, he begins to realize that Siedel's murder could yield more suspects than the team had anticipated. Booth also seeks out Aldo Clemens, his friend and an ex-priest from their military days together, to get advice on his relationship with Brennan, now that Pelant has put a wedge between them. Meanwhile, Brennan must decide whether to have faith in Booth or to end her relationship with him.
The Jeffersonian team investigates the murder of Jamie Delcampo, a member of the Estrellas Locas gang, whose remains were found in a burnt out car. Meanwhile, having taken time off from the FBI in the wake of Pelant's latest assault on the team, Sweets ultimately decides to help with the investigation when he discovers that a young boy from the center where he volunteers is the son of one of the gang members.
Pelant is back, and the members of the Jeffersonian team want to put an end to the hold he's had over them, once and for all. When a human cadaver is willed for research to the team, they devise a plan, with the help of Special Agent Hayes Flynn, to stage the human cadaver in a way that Pelant would stage a murder, and steal his spotlight in order to flush him out. But their plan backfires when Pelant is a step ahead of them, resulting in him killing someone close to Booth. Meanwhile, Sweets returns from his leave of absence and is convinced that Agent Flynn isn't the person whom everyone thinks he is.
The Jeffersonian team investigates the death of Lana Brewster, a girl whose remains are delivered to Brennan and Booth's home by someone who believes her death 18 years ago was no accident. When the team discovers that Lana was murdered and her death was covered up, people from her past become key suspects, including an ex-boyfriend with whom Hodgins was friends. Meanwhile, Brennan starts having dreams again about evil tech genius Pelant, and about a potentially more heinous killer, whom she realizes could be involved with Lana's death.
When the Jeffersonian team discovers remains of a victim, and elements of the crime scene point to a possible protégé of serial killer Christopher Pelant, they must revisit their prior work on Pelant while tracing new clues that will hopefully lead them to the copycat killer. Meanwhile, Angela is skeptical about her and Hodgins decision to move to Paris and Brennan and Booth contemplate options outside of the Jeffersonian and FBI.