On Blue Bloods, Frank Reagan (Tom Selleck) and his son Danny (Donnie Wahlberg) have always had a complicated but strong relationship. However, as the series progresses, tensions between them start to rise. The two often clash over how to approach law enforcement cases, with Frank taking a more by-the-book approach, while Danny is known for his more aggressive, sometimes reckless, methods. Their disagreements create a rift, leading to moments of emotional distance.

The turning point in their relationship comes when Danny’s impulsive behavior puts him at odds with Frank’s expectations for family loyalty and responsibility. Frank, as the head of the NYPD and a father, struggles to balance his professional duties with his personal desires to protect his family. Danny, feeling misunderstood and frustrated by his father’s strict approach, often pushes back, which leads to heated exchanges and moments of tension.

Despite the friction, the father-son bond remains unbreakable, and over time, Frank and Danny work through their issues. They come to realize that while they may have different methods and philosophies, they both share a deep commitment to justice and family. These moments of tension serve to deepen their relationship, showing that even in the toughest of times, their love and respect for each other always prevail.