Personality Transplant (S01E09)

Following a heart transplant, a patient experiences a strange shift, adopting the personality traits of his donor. This raises questions about whether human organs can retain memories or aspects of our identity. Meanwhile, unusual ice circles are forming on lakes and rivers worldwide, some large enough to be seen from space. What could be causing this extraordinary occurrence? Additionally, a mother from Philadelphia takes a standard DNA test and discovers she has no genetic connection to her four children. How can this be explained?