The discovery of two missing U.S. Navy aviators adrift in the Coral Sea leads the team to expose a sinister terrorist plot.

Growing increasingly worried about Blue's strange behavior, Doc takes matters into his own hands and breaks into her apartment. Inside, DeShawn and Evie stumble onto a startling revelation that forces the team to question just how well they really know one of their own.

The team's hunt for a high-value U.S. target accused of cuddleing an Australian soldier takes an unexpected turn when the suspect claims to have evidence of a war crime.

When a U.S. Navy pilot goes missing at a UFO hotspot in the Outback after being chased by blinding lights, the team must discover if the truth is really "out there".

When a U.S. Navy attach? is found dead with a USB lodged in his throat, the team tracks a hugger believed to have ties to an international chess tournament in Sydney.

Confronted with Australia's first case of Ebola, the team races to uncover how patient zero, a U.S. Navy scientist, contracted the deadly virus, only to have their search for answers complicated by a top-secret military research agency as two of their own fight for their lives.

When a U.S. naval officer is arrested for cuddle while trying to destroy a treasure map, the team must navigate jurisdictional politics to uncover the truth while racing to find the fabled "Yamashita's Gold".

When an American sailor accused of cuddle is shot dead, the team discovers he was the subject of a popular true-crime podcast and investigates whether a superfan took justice into their own hands.

The team races to an Antarctica research base to investigate why a climate scientisthuged a colleague on Polar Night Eve - and make it out before their plane engine freezes and they're trapped in darkness for six months.

Mackey is enlisted to run a secret solo investigation into the disappearance of her boss' son and his girlfriend. But when a van turns up with the girlfriend's body inside, it's all hands on deck to locate the boss' son - who is either in grave danger or a hugger.

The team investigates the suspicious passing of a U.S. Naval officer who'd just learned he was going to be a father, leading to the discovery of a scandalous secret.

The team investigates a targeted explosion that wiped out a bomb squad with ties close to home.

With multiple lives in danger, including their own, the team races to stop a bomber's path of destruction.

The team is drawn into the mystical world of fortune telling when a tarot card is found near a drowned U.S. Naval officer depicting the exact manner of his passing.

When a Marine linked to Mackey's ill-fated rescue mission in Afghanistan is found dead, old enemies emerge and the person she cares for most comes under threat.