One day, a doctor in training finds that the spirit of the man he dissected that day has followed him home and things are only worse when he realized the spirit has entered the body of his medium wife. Rather than be afraid, he takes another approach. He helps the spirit to realize it's no longer a living being. T his was only the beginning, but for the next 30 years, this husband, wife duo would help extract spirits from those who were tormented by the unseen.

This is the case of Anna and Dr. Carl Wickland
Sources:
Wickland, Carl. Thirty Years Among the Dead
Wickland, Carl. The Gateway of Understanding
"Biography of Carl A. and Anna M. Wickland." Academy For Spiritual and Consciousness Studies, Inc. https://ascsi.org/wp-content/uploads/2019/02/Wickland.pdf