The strange disappearance of pilot Fredrick Valentich in 1978, is one of aviation’s greatest unsolved mysteries. In the episode, we examine the mystery, including the bizarre radio transmissions from Valentich, which include the chilling line, “…it’s not an aircraft.” Was it a tragic accident, a hoax gone wrong, or a close encounter with a UFO? Could it be something else completely unexpected? Join us as we fly into mystery.