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Dr. Thomas Galen (died February 2015) was a doctor at St. Catherine's Hospital, in which he revealed to Zed that she had tumour located in her brain's temporal lobe. He was later revealed to be infected with the dark matter called "Black Diamond" while serving in the military, becoming an unwilling killer. Because of him being an innocent soul, Manny reappears as an angel and takes him to Heaven afterward.

Appearances

Constantine

Season 1