A rash of jewelry store thefts end in a double homicide and the investigation to find the perpetrator uncovers a connection to a teenager in foster care.

A college co-ed goes missing and is feared to be abducted, so Jubal focuses on getting any information he can from the father of the abductor's previous victim.

An anti-government group suspected of bombings holds regular meetings at a bar, so Maggie goes undercover at the establishment to investigate further.

The team investigates the murders of a Muslim college student and his younger brother and discover that the victims were wrongly targeted as terrorists.

An anti-gun lobbyist building is the victim of a bombing attack with the threat of more to come; OA is tempted with a suspicious promotion with conditions.

A murder victim that has been bound with a distinct knot has ties to a cross-country serial killer with the same style that also relates to Isobel's father.

An ICE vs DEA hockey game ends with an agent dead, leaving the team to search for the killer while also protecting a congressman they think might be next.

A young couple recently come back from vacation are found dead in a park, setting off a search for a killer with potential links to the drug trade.

The team finds out that a terrorist group may have been given lethal sarin gas, bringing one of OA's worst nightmares to life.