After Jamie and Eddie announced their engagement in last season's finale, season nine finds the Regean family questioning the future of their partnership. Frank considers whether it's appropriate for the couple to continue working together, while Erin is on tap for a promotion after her boss's untimely death and Danny prepares to send his eldest son, Jack, to college.

Title from container. Originally broadcast as single episodes of a television program in 2018 and 2019. Widescreen 16:9. Special features: behind-the-scenes featurettes with cast and crew interviews; deleted scenes; gag reel.

Disc 1.Playing with fire -- Meet the new boss -- Mind games -- Blackout -- Special features. Disc 2. Thicker than water -- Trust -- By hook or by crook -- Stirring the pot -- Handcuffs -- Special feature. Disc. 3. Authority figures -- Disrupted -- Milestones -- Ripple effect -- Special feature. Disc 4. My brother's keeper -- Blues -- Past tense -- Two-faced -- Rectify -- Special features. Disc. 5. Common enemies -- Strange bedfellows -- Identity -- Something blue -- Special features.