Danny suspects a vigilante serial killer is on the loose and how will Erin react when her ex-husband show up in court on Blue Bloods?

On Blue Bloods, when a woman recants her claims of domestic disturbance, Danny and Jackie continue to investigate and find she’s having an affair with a powerful politician who is also a friend of Frank’s.

Michael Madsen guest stars on the Season 3 premiere of Blue Bloods as a criminal from Danny’s past kidnaps Jackie. Jamie meets his new partner and officer accidentally shoots an innocent man.