51: Taos Hum
In their return from a brief absence, the ParaBabble team investigates the strange humming noise that 2% of a small town in New Mexico have been hearing periodically for several decades. Is it aliens? Government experiments? Or just some lame science explanation about sound and the way the Earth moves or something? Also, the team gets in trouble with Alison's parents for babbling and swearing too much.
It is Free