- Adam Farmer (Paul Delmonte) – teenage protagonist
- David Farmer (Anthony Delmonte) - Adam's father, a former newspaper man. He pretends to work for an insurance company.
- Louise Farmer/Delmonte - Adam's mother
- Amy Hertz - Adam's friend and love interest
- Brint - Adam's questioner and "guide" as his doctor
- Mr. Grey - agent in the Witness Protection Program
- Arthur - a fat man in the town of Hookset who tells Adam of Junior Varney
- Dr. Dupont - a friendly doctor in a mental hospital; Adam is his patient
- Junior Varney - a troublemaker and thief in Hookset
- Whipper and friends - bullies in Carver
- Old man by the gas station - warns him about trusting strangers
- The elderly couple - the man helps him out of the ditch, while the woman criticizes him
- Aunt Martha - the only relative they're allowed to talk to
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