Ep 8. Everlasting Love

This is an anime-original episode. Sam and Dean investigate a serial murder case and learn that since the 1960's similar murders have been repeated every 15 years. They meet Dr. Richard, the widower and Richard's young and beautiful second wife, Michelle. More attacks occur. The boys become suspicious of Richard and uncover the mystery; Richard couldn't accept the death of his wife Abigail, so he brought her ghost back to life, resurrecting her body with the organs of murdered women. But the organs only lasted 15 years...