Achanak 37 Saal Baad.

Achanak 37 Saal Baad (English: All of a Sudden After 37 Years) is an Indian supernatural and Psychological thriller television serial telecast on Sony Entertainment Television between 2002 and 2003. The centerpiece of this serial was the little-known small town of Gahota, which experienced paranormal activities after each cycle of 37 years, causing a strange hysteria in people and leading them to kill others or themselves and not remembering anything once the cycle is over in a few months.