An emotionally disturbed teenager whose father is a research scientist takes a rat from his father's laboratory that is infected with an incurable virus that can kill 100 million people in three weeks.

• Lawrence Gordon Productions
• ABC
• Ed Nelson
• Leonard Nimoy
• George O'Hanlon, Jr.
• Gary Morgan
• José Ferrer
• Kathleen Quinlan
• Marjorie Lord
• Armand Alzamora