The man was a doctor and very close to his daughter. They once watched old movies together at Christmas while it snowed for hours outside.
However, he suffered from multiple sclerosis with his wife, Dr. Carla Tannhauser, trying to cure him for many years. Eventually, he died, much to heartache of his wife and daughter. As Carla tried to cope with the tragedy by burying herself in the work, she and Caitlin became estranged from one another.
The man was a very loving and caring father. He was also a very loving husband as Carla Tannhauser couldn't handle the pain when he died.
- "The Reverse-Flash Returns" (mentioned)