In the hours after the Springfield Three disappeared, friends waiting inside the house received several strange telephone calls. The caller made obscene remarks and hung up before anyone could identify them. Were the calls connected to the disappearance, or simply an unfortunate coincidence? Investigators have never been able to answer that question. Sherrill Levitt, Suzie Streeter, and Stacy McCall remain missing.

In this episode of Unsolved and Missing, we examine the mysterious phone calls, the first critical hours of the investigation, and why lost evidence can haunt a case for decades.