Thomas Milbank was an FBI agent, and part of team assigned to protect an American scientist. A West German assassin hired by the USSR pays a prostitute to seduce Agent Milbank, providing a distraction while he plants an explosive device in Milbank's radio. When it detonates, it kills Milbank, two other FBI agents, and the scientist they were supposed to protect.
After his death, Agent Loeb says "I worked with Tom six years in C.I.D. Three girls. Great dad."