FBI Special Agent Don Eppes (Rob Morrow) has a secret weapon when dealing with Los Angeles’ most baffling crimes: his genius mathematician brother, Charlie (David Krumholtz). While Don heads a team of FBI agents in investigations, Charlie reconstructs the crimes using mathematical models.
S1/EP 1 - Pilot
Without any leads, the FBI turns to Agent Eppes' genius mathematician brother to catch a rapist.
S1/EP 2 - Sabotage
While investigating a deadly freight train accident, Don and Charlie discover a shocking culprit on a mission.
S1/EP 3 - Vector
Don relies on Charlie's mathematical insight to help stop a virus that has been killing innocent people in Los Angeles.
S1/EP 4 - Uncertainty Principle
A pair of bank robbers are quietly taking LA by storm but Charlie delivers an equation that may predict their next location.
S1/EP 5 - Structural Corruption
Charlie convinces Don to investigate a student’s suicide in order to make sure that it was not murder.
S1/EP 6 - Prime Suspect
Don recruits Charlie's help when the daughter of a fellow mathematician is kidnapped and held for ransom.
S1/EP 7 - Counterfeit Reality
When FBI agent Don Eppes finds several murders are linked to counterfeiting, his brother helps the case.
S1/EP 8 - Identity Crisis
Don fears that he may have sent an innocent man to jail after evidence is re-examined.
S1/EP 9 - Sniper Zero
The FBI pursues a sniper who is causing widespread panic in LA after four people are killed.
S1/EP 10 - Dirty Bomb
Don must find the hijackers of a truck carrying nuclear waste before they detonate a dirty bomb in Los Angeles.
S1/EP 11 - Sacrifice
The murder of a computer researcher brings to light a potentially damaging government study causing Charlie to rethink his life's work.
S1/EP 12 - Noisy Edge
Don and Charlie's investigation of an unidentified flying object leads to a murder investigation.
S1/EP 13 - Man Hunt
Don must track down two violent felons who escape after a prison bus crash.
S1/EP 14 - Assassin
Charlie helps Don break a secret code found at a crime scene that could uncover a plan for the assassination of a Colombian exile.
S2/EP 1 - Judgment Call
The team investigates when a judge's wife is killed.
S2/EP 2 - Bettor or Worse
Don and his FBI team rush to find the wife and daughter of a jewelry store owner who have been kidnapped and held for ransom.
S2/EP 3 - Obsession
Don's investigation of a pop singer's stalker leads to the murder of a paparazzo.
S2/EP 4 - Calculated Risk
A whistle-blowing CFO of a recently bankrupted energy company is murdered, leaving behind his son and thousands of suspects.
S2/EP 5 - Soft Target
Don and his team must stop a suspect who interfered with crucial counter-terrorism drills in LA.
S2/EP 6 - Convergence
Don and his team are called in when a father is murdered in the latest of a series of upscale home robberies.
S2/EP 7 - In Plain Sight
A routine bust on a methamphetamine lab uncovers an unusual case that effects Charlie.
S2/EP 8 - Toxin
Don and Megan must find a disgruntled former employee of a pharmaceutical company who is tampering with over-the-counter medications.
S2/EP 9 - Bones of Contention
When a controversial human skull is found on Native American land, it is up to Don and his team to find a young researcher's killer.
S2/EP 10 - Scorched
Don and his team investigate a series of fires in LA that are linked to a radical environmental group.
S2/EP 11 - The O.G.
Don and the FBI team must investigate the death of a fellow agent who was working undercover as an LA gang member.
S2/EP 12 - Double Down
A murder at a LA card club uncovers an elaborate and deadly card counting scam.
S2/EP 13 - Harvest
The death of a young girl leads the FBI to uncover a black market organ trafficking ring in LA.
S2/EP 14 - The Running Man
The theft of an expensive DNA machine leads the FBI to suspect an honors science student.
S2/EP 15 - Protest
A deadly anti-war bombing becomes personal for Don and Charlie when the investigation reveals information about their father's past.
S2/EP 16 - Mind Games
Charlie battles a psychic to predict how to save a female migrant from murder.
S2/EP 17 - All’s Fair
After an Iraqi woman is murdered, clues lead to an American military suspect.
S2/EP 18 - Dark Matter
A deadly shooting at a local high school leads the FBI to a surprising suspect.
S2/EP 19 - Guns and Roses
When an ATF commits suicide, Don asks Charlie to help prove it was murder.
S2/EP 20 - Rampage
After an assailant opens fire in the FBI offices, Charlie does not want to return.
S2/EP 21 - Backscatter
The Russian mob threatens Don as Charlie continues to investigate.
S2/EP 22 - Undercurrents
Don and Charlie work together to find out how inflected bodies of young women landed on an LA beach.
S2/EP 23 - Hot Shot
Don's team investigates a rapist who's converted to a serial killer.
S3/EP 1 - Spree: Part 1
Charlie and the team track a couple who are spree killers, but their actions seem to defy profiling.
S3/EP 2 - Two Daughters: Part 2
The team is in a race against time to rescue fellow agent Megan.
S3/EP 3 - Traffic
Don and his team must determine if a shooting on the freeway was a random act of violence or the work of a serial killer.
S3/EP 4 - Provenance
Don and his team must track down a thief who stole a very valuable painting from a museum just before it was to go on tour.
S3/EP 5 - The Mole
When an interpreter from the Chinese consulate is killed in a hit and run accident, Don and his team uncover an unlikely connection to the department of justice.
S3/EP 6 - Longshot
When Don and his team investigate a murder at a horse track, they stumble onto more than just a plot of betting on fixed races.
S3/EP 7 - Blackout
When a series of blackouts occur in power stations leaving LA in the dark, don and his team must determine if it is an accident or the work of terrorists.
S3/EP 8 - Hardball
Don and his team investigate the death of a minor league baseball player to determine if it was an accidental overdose of steroids or a homicide.
S3/EP 9 - Waste Not
Don and his team investigate the possibility of an environmental crime when a sinkhole collapses under a playground.
S3/EP 10 - Brutus
Don and the FBI search for the mastermind behind a government backed project that brainwashed prisoners of war and turned them into sleeper assassins.
S3/EP 11 - Killer Chat
Don and his team track a serial killer who is targeting sex offenders preying on young girls.
S3/EP 12 - Nine Wives
Don and his team hunt for a leader of a polygamous cult, who is on the FBI's most wanted list.
S3/EP 13 - Finders Keepers
When a multi-million dollar racing yacht sinks during a race, don and his team are called to investigate after the treasure hunt to find the wreckage turns deadly.
S3/EP 14 - Take Out
Don and his team investigate a string of deadly restaurant robberies.
S3/EP 15 - End of Watch
Don and his team re-open a cold case when the badge of a missing LAPD officer, who is presumed dead, is found at a construction site.
S3/EP 16 - Contenders
Don and the FBI investigate the mysterious death of a mixed martial arts fighter who dies in the ring.
S3/EP 17 - One Hour
While Don is unreachable, the FBI and Charlie race to find a music mogul's kidnapped son.
S3/EP 18 - Democracy
Charlie suspects that a series of murders are tied to a voter fraud conspiracy.
S3/EP 19 - Pandora’s Box
Charlie and Don try to determine what caused a corporate jet to mysteriously crash in a forest.
S3/EP 20 - Burn Rate
Don and Charlie track a serial letter bomber.
S3/EP 21 - The Art of Reckoning
Don questions whether a death row inmate has ulterior motives when he suddenly agrees to cooperate with the FBI about several unsolved murders.
S3/EP 22 - Under Pressure
Don and his team conduct a terrorism investigation after they receive word that a deadly nerve agent stolen from a chemical supply company may be in the city's water supply.
S3/EP 23 - Money for Nothing
Don and the FBI search for the hijackers of a truck filled with medical supplies and 50 million dollars for an African relief effort.
S3/EP 24 - The Janus List
Don and Charlie discover a buried secret that will change the FBI team forever.
S4/EP 1 - Trust Metric
Don and his team work to track down a mole who escapes from prison.
S4/EP 2 - Velocity
Charlie’s precise analysis reveals there’s more to a speeding car crash that leaves one person dead and many injured.
S4/EP 3 - Hollywood Homicide
Don and his team are thrown into the world of a Hollywood entourage when a rising actor is implicated in a murder.
S4/EP 4 - Thirteen
Charlie is uncomfortable when the team has to use a numerologist to solve the current case.
S4/EP 5 - Robin Hood
Don and Charlie investigate an apparent do-good bandit who may have ulterior motives.
S4/EP 6 - In Security
Don is devastated when he thinks he led a killer to a secured witness, and Charlie sets out to prove he wasn't responsible.
S4/EP 7 - Primacy
Don and the team investigate the world of obsessive video gamers after a man plunges to his death.
S4/EP 8 - Tabu
When his daughter is kidnapped, a wealthy man on causes problems for the FBI.
S4/EP 9 - Graphic
A comic book convention becomes a crime scene after a deadly robbery leads to the disappearance of an extremely rare comic.
S4/EP 10 - Chinese Box
Don and the team must save one of their own who is taken hostage.
S4/EP 11 - Breaking Point
Charlie is harassed to stop his work for the FBI.
S4/EP 12 - Power
Don and his team must track down a serial rapist thought to be in a position of police authority.
S4/EP 13 - Black Swan
When Don's intuition leads to the arrest of a bystander, a covert insurgent operation is exposed.
S4/EP 14 - Checkmate
Robin Brooks is back in town, and her involvement in Don's case brings back memories as they try to keep witnesses alive.
S4/EP 15 - End Game
The team tracks a gang of military thieves after they kidnap family members of an ex-marine who is wanted for murder.
S4/EP 16 - Atomic No. 33
The team investigates a dangerous cult after members refuse medical attention following a mass poisoning at their compound.
S4/EP 17 - Pay to Play
The murder of a rapper puts Charlie to work analyzing the mathematics of the music business in the same week that Amita's parents come to town.
S4/EP 18 - When Worlds Collide: Part 1
Charlie and Don butt heads after one of Charlie's colleagues is arrested because of his suspected ties to a terrorist group.
S5/EP 1 - High Exposure: Part 2
Don and the team hunt down the killers of two rock climbers in possession of a stolen diamond.
S5/EP 2 - The Decoy Effect
The team races to find a group of kidnappers who have their victims drain their bank accounts using ATMs.
S5/EP 3 - Blowback
Agent McGowan makes his move against Don, and Colby gets a little too involved with one of the suspects in a cop killing.
S5/EP 4 - Thirty-Six Hours
When two trains collide, Don and his team must find a way to rescue trapped passengers and investigate possible sabotage or terrorism linked to the crash.
S5/EP 5 - Jack of All Trades
The team assists a veteran agent track an elusive con man, while a decision is made about Charlie’s security clearance and don’s future with the FBI.
S5/EP 6 - Scan Man
The death of an agent kicks everyone into high gear, and Charlie steps on toes re-establishing himself as the resident expert.
S5/EP 7 - Magic Show
Don and the team investigate the real disappearance of a magician after she mysteriously vanishes during an illusion.
S5/EP 8 - Charlie Don’t Surf
While investigating the death of a former pro surfer-turned park ranger, the team uncovers a shocking connection to another crime.
S5/EP 9 - Conspiracy Theory
The team works with a conspiracy theorist to stop a bombing.
S5/EP 10 - Frenemies
Charlie and Marshall Penfield work on their collaboration issues when Charlie must consult with him on a case involving robbery, murder and revenge.
S5/EP 11 - Arrow of Time
Buck Winters escapes from prison and comes after Don.
S5/EP 12 - Jacked
Charlie's hacking skills are put to the test when the team tries to rescue hostages on a bus.
S5/EP 13 - Trouble in Chinatown
The abduction of an undercover agent brings ex-CIA psychic Simon Kraft back into the Eppes' lives.
S5/EP 14 - Sneakerhead
The team chases after a pair of rare sneakers that just keep disappearing, leaving death and injuries in their wake.
S5/EP 15 - Guilt Trip
The team looks into the possibility of jury tampering after a high-profile criminal is acquitted.
S5/EP 16 - Cover Me
An old friend who's a DEA agent agrees to assist Liz in an undercover operation when Charlie uses math to affect the city's drug traffic.
S5/EP 17 - First Law
The team's investigation into the death of a scientist takes a strange turn when they find their prime suspect is a super computer.
S5/EP 18 - 12:01 AM
The impending execution of a dangerous mob boss forces the team to scramble when new information comes to light that could clear him.
S5/EP 19 - Animal Rites
After the death of a professor, the team begins to suspect animal rights activists may be to blame
S5/EP 20 - The Fifth Man
During an investigation into a series of home invasions, Don's life hangs in the balance after being injured in a raid.
S5/EP 21 - Disturbed
Still feeling responsible for putting Don's life in jeopardy, Charlie focuses his efforts on hunting down a serial killer.
S5/EP 22 - Greatest Hits: Part 1
Don and the team investigate a string of copycat bank robberies and zero in on a familiar face as a suspect.
S5/EP 23 - Angels and Devils: Part 2
When Amita is abducted, the team's frantic search zeroes in on a sociopath as the suspect.
S6/EP 1 - Hangman
Don and the team must protect a political activist from a possible sniper.
S6/EP 2 - Friendly Fire
When FBI agents are killed during a shootout with bank robbers, Don and the team are brought in to investigate.
S6/EP 3 - Seven Men Out
Don and the team must uncover who is at the center of a deadly gambling operation.
S6/EP 4 - Where
Don and the team investigate murders that are being copied from a yet-to-be-released movie.
S6/EP 5 - Hydra
Don and the team search for the kidnapped daughter of a geneticist.
S6/EP 6 - Dreamland
When spooky occurrences take place at an old air base, the team thinks the happenings are less paranormal and more sinister.
S6/EP 7 - Shadow Markets
The team's undercover cyber sting goes awry and the resulting turf war could lead to murder.
S6/EP 8 - Ultimatum
While investigating a heroin ring, agent Ian Edgerton becomes a murder suspect.
S6/EP 9 - Con Job
As they search jewel robbers, the team finds an unlikely ally in a convict.
S6/EP 10 - Old Soldiers
When the team foils the robbery of an armored car filled with money from the infamous D.B. Cooper heist, they call on agent roger bloom for his help.
S6/EP 11 - Scratch
Don and the team hope they hit the jackpot when they investigate the theft of scratch-off lottery tickets.
S6/EP 12 - Arm in Arms
Don and the team search for a missing shipment of deadly firearms when one of the weapons is linked to murders.
S6/EP 13 - Devil Girl
Don and the team search for a serial killer who is targeting men that hire prostitutes.
S6/EP 14 - And the Winner Is…
Don and the team are put in the limelight when they search for jewels that go missing during an awards broadcast.
S6/EP 15 - Growin’ Up
Don and the team investigate the mysterious deaths linked to childhood sexual abuse.
S6/EP 16 - Cause and Effect
After a big wedding, the team turns its attention to tracking down Don's missing gun.
