Agent Hauser's technician/colleague and friend. In 1963, she was known as Dr. Lucille Sengupta, who served as a psychiatrist at Alcatraz.

A PhD in both Criminal Justice and Civil War History, author of books on Alcatraz, comic book store owner, writer, and artist.

The warden of Alcatraz. He apparently vanished with the rest of the inmates, and his present whereabouts are unknown.

Rebecca's great-uncle and former Alcatraz prison guard. He was approached by Hauser to join the task force sixteen years ago, but rejected the offer.

A San Francisco Police Department homicide detective with family ties to Alcatraz. She was raised by her great-uncle – a former Alcatraz guard and, later, cop.

The deputy warden of Alcatraz, whose cynical views of the inmates often put him at odds with Edwin James.