Departure

When TransOcean Flight 716 vanishes over the Atlantic Ocean with 256 people on board, crash investigator Kendra Malley is called in.

The team pursues leads as they wait to see if the surviving witness will regain consciousness; Theo examines the possibility of mechanical failure; marine expert Nadia pinpoints 716's final resting place on the ocean floor and calls the Royal Navy.

Kendra gets an important clue from Madelyn; a friend of Captain Donovan's appears at the TSIB offices and reveals he was agitated and unstable the night before Flight 716 took off; AJ obsesses over an online conspiracy that blames a Russian oligarch.

Though the flight simulator all but confirms the cause of the crash, Kendra isn't convinced -- especially once Madelyn starts remembering her escape from the plane; Dom suspects that Derek's death was the result of a botched murder attempt.

AJ is injured but alive after his accident; after being attacked, Kendra uncovers a stunning betrayal by someone close to her; a second attempt at reaching the black boxes reveals a new layer to the mystery.

After recovering the black boxes, Kendra investigates Hoffman and brings the full story of the Flight 716 disaster to light.