While Danny's mother is questioned by the FBI, McGarrett partners with a young man with autism who may have information to help solve the murder of his only friend. Melanie Griffith guest stars.
Magnum investigates the murder of a man who, pre-death, hires Thomas to find his killer. Also, Kumu reconnects with an old friend.
A distinguished Frenchman contacts Magnum and asks for his help in supposedly finding a missing heir.
