009-1 S01E09 - Revenge

On a mission 009-1 winds up killing a man but not before she's shot up as well. As he dies he tells "Little Billy" that he's sorry. After recuperating, 009-1 takes some time off but some biker thugs throw nails at her car and her tires go flat. A man and his family pick her up and they take her with them. Along the way they tell her about the man's brother and how good he was. After the wife and son fall asleep in the car, the man takes 009-1 to his old house and tells her about how his brother used to call him "Little Billy".