Sadly, as a result of the Nazi experiments, Helen was unable to have children. The great volcano of Mount St. Helen in southwestern Washington is responsible for one of the deadliest eruptions in American history when it erupted in 1980. He thought about giving his birth mother a second chance. The Wandering Rocks of Valley Racetrack Playa, a desert lake bed that lies in the mountains above Valley, has been the site of an extraordinary phenomenon- rocks that seemingly move by themselves. Extra Notes: This case first aired on the January 15, 1992 episode. The series was then acquired by CBS in 1997, where it continued for a short run of 2 seasons. Helen has no idea if the airmen were ever rescued; however, in 1992, a retired U.S. Air Force colonel told her that there had been missions to pick up downed U.S. military personnel in Czechoslovakia. In the early 1990s, Karl and his wife Helen were . Police noticed shoe prints in the snow leading to Lake St. Clair, however, there was no sign of JoAnn in the water. Unsolved Mysteries is available for streaming on Amazon Video, YouTube and Hulu. Search Sitcoms Online: