All 22 episodes from the sixth season of the US drama series following a family of New York cops headed by Frank Reagan (Tom Selleck). As well as the head of the family, Frank is the New York City Police Commissioner, following in the footsteps of his father, Henry (Len Cariou). Frank's children also share his passion for law and order: Danny (Donnie Wahlberg) is an NYC detective, Erin (Bridget Moynahan) works in the District Attorney's office and Frank's youngest son Jamie (Will Estes) works undercover. In this season, New York goes into lockdown following a terrorist threat and Danny is assigned a possible serial killer case. The episodes are: 'Worst Case Scenario', 'Absolute Power', 'All the News That's Fit to Click', 'With Friends Like These', 'Backstabbers', 'Rush to Judgement', 'The Bullitt Mustang', 'Unsung Heroes', 'Hold Outs', 'Flags of Our Fathers', 'Back in the Day', 'Cursed', 'Stomping Grounds', 'The Road to Hell', 'Fresh Start', 'Help Me, Help You', 'Friends in Need', 'Town Without Pity', 'Blast from the Past', 'Down the Rabbit Hole', 'The Extra Mile' and 'Blowback'.