Sebastian Callahan is the towns local Physician. He is a man known to mind his own business. Sebastian came to Harmony twelve years ago. At the time he was a drunk and gambler and racked up a fair amount of debt. Gilbert Murphy offered to him a way to pay off his debts by working as the town Physician. Three years ago he finished paying off the debts and is now trying to save up money. He is not very happy with his lot in life and hopes to one day get enough money to move to a big city. Until then he treats the people of Harmony as needed.