Frank looks into the murder of a cop who was one of Henry's fellow officers years earlier on Blue Bloods. "Sins of the Father" is the tenth episode of the show's fifth season.
Henry turns out to be a key witness on one of Danny and Baez's cases on Blue Bloods. "Erasing History" is the 13th episode of the show's eighth season.
Danny and Henry spar when Henry is the main witness in a murder case on Blue Bloods. "Erasing HIstory" is the 13th episode of the show's eighth season.
