A Punjabi wedding celebration comes to a murderous close when two professional hit men open fire on the groom and guests, then abduct the couple’s baby.
A woman’s body, with multiple stab wounds, wrapped in plastic, is found floating in the ocean. The extent of her injuries suggests a rage killing, making it very likely that the victim knew her attacker.
A young woman pleads with Sullivan and Lynch to re-open her sister’s childhood murder, fearing that the wrong men were convicted and sentenced to life in prison.
A brutal sexual assault and murder has eerily similar characteristics to an earlier unsolved case Lynch worked on, and she is convinced she knows who the killer is.
While two prisoners are being transferred to the city jail, one of them manages to get hold of an officer’s gun and creates a dangerous standoff with the Homicide detectives.
Ben Sullivan and Amy Lynch are assigned to the murder of an attractive woman, shot dead at close range, and their investigation reveals that she had ties to an escort service.
Ben struggles to keep his alternate personalities in check while investigating the violent death of a prominent Chinese doctor who may have ties to a notorious drug dealer.
Peter, Walter, Olivia and Broyles pursue a strange and deadly occurrence in Philadelphia where a bomb blew up inside a train station but left no trace of any explosive device. The perplexing and unexplained set of circumstances returns Walter to the lab to closely examine the human remains where he uncovers an unlikely energy source that triggered the explosion. With the explosive threat of more bombs and links to a classified military project, the intense investigation leads Olivia and Peter to Iraq.
Peter, Walter, Olivia and Broyles pursue a deadly occurrence in which a bomb blew up inside a train station but left no trace of any explosive device.
Unexplained bombs put innocent lives on the line and the FBI's Fringe Team in a race against time to defuse the mysterious threat.
Eight out of the original 25 suspects strive to be one of the few survivors as all answers are revealed, on the season finale.