A veteran uses virtual reality to face his demons; A team gives artificial intelligence to sex dolls; Workers help computers learn to be human.

An amateur sleuth seeks justice in the case of a young woman's mysterious death; A digital activist is forced to choose between prison and exile.

Enter the world of digital money, featuring the recesses of the dark net marketplace, where Chinese workers excavate a new form of money.

An Alt-Right organizer urges online sympathizers to join his rebellion; A 17-year-old girl is brainwashed into posting White Nationalist YouTube videos.

Facial recognition technology ties a man to a crime he didn't commit; A father wires his home with face recognition technology to keep his autistic daughter safe; Gain exclusive access to the FBI Biometric Technology Center.

A woman's home is invaded by a Ratter, a digital stalker who gains entry through her laptop; A neighborhood battles over proposed camera surveillance; A sex offender's punishment involves their life being under constant surveillance.

Social media can connect people in many positive ways, but the platforms can also be abused to anonymously harass and threaten individuals.