One of the most authentic relationships in Chicago Fire is the bond between Chief Wallace Boden and Christopher Herrmann. Their mutual respect and quiet loyalty have carried Firehouse 51 through countless crises. But what makes their on-screen dynamic so believable? The answer lies behind the scenes.
Decades Of Trust, On And Off Set
Eamonn Walker (Boden) and David Eigenberg (Herrmann) have been working together for over a decade. Unlike many TV co-stars, their connection isn’t just professional—it’s personal. According to crew reports and cast interviews, the two are often seen laughing between takes, discussing scenes in depth, and encouraging younger cast members.
Their real-life camaraderie informs every scene. The quiet glances, the subtle nods of approval, and even the occasional arguments all feel lived-in—because in many ways, they are.
A Shared Philosophy On Acting
Both actors come from a theater background, and they bring that mindset into their performances. In interviews, Eigenberg has praised Walker for his “groundedness,” while Walker has described Eigenberg as the show’s “heartbeat.” That mutual admiration spills into their characters’ chemistry—Boden, the stoic commander; Herrmann, the emotional engine.
When Real Life Influences the Script
Writers of Chicago Fire have acknowledged tailoring certain moments to reflect the actors’ chemistry. The now-iconic scene where Boden defends Herrmann from a disciplinary board was written after the showrunners noticed how powerfully Walker responded to scenes involving his friend.
Sometimes, the best acting comes from not acting at all.
