Jackie Cooper guest stars as scientist Dr. Norman Chase, who early in the proceedings is waylaid by the minions of a criminal named Caesar (Richard Jaeckel) and forced to put on an explosive belt that cannot be removed . Unless Ironside (Raymond Burr) agrees to release three of Caesar's cohorts from prison, the belt will detonate in five hours. Racing against time, the Chief seeks out a duplicate for the key to the fatal belt. ~ Hal Erickson, Rovi