|For other uses, see Mason (disambiguation)|
- "Can someone remove these cuffs?"
"The cuffs stay on."
- ―Mason and Brett Mahoney
Doctor Mason is a phycisian working at the Sacred Saints Hospital.
As NYPD brought heavily injured Frank Castle to the Sacred Saints Hospital, Mason was assigned to provide medical assistance to him. Mason asked Brett Mahoney to remove the handcuffs, however, Mahoney ultimately refused, so doctors had to proceed the operation with it. Mason and other doctors managed to stabilize Castle's condition and left him under NYPD custody.