A gifted high school student steals plutonium from the secret nuclear weapons facility in his home town in order to construct his own nuclear bomb, win a national science fair, and expose the government's secrets.

John Lithgow
as John Mathewson

Christopher Collet
as Paul Stephens

Cynthia Nixon
as Jenny Anderman

Jill Eikenberry
as Elizabeth Stephens

John Mahoney
as Lt. Col. Conroy

Richard Jenkins
as Radiation Controls Officer

Sully Boyar
as Night Guard

Timothy Carhart
as Relief Guard

Gregg Edelman
as Science Teacher

JD Cullum
as Eccles (as John David Cullum)