*Eamonn Walker, best known for his role on HBO’s “Oz,” is the first actor cast in NBC’s ensemble drama pilot “Chicago Fire,” executive produced by Dick Wolf.

In the action-driven drama exploring the complex and heroic men and women of the Chicago Fire Department, Walker will play Chief Walter Boden, a former Golden Gloves champ who is mulling retirement, reports Deadline.com.

Jeffrey Nachmanoff is directing the pilot from a script by Derek Haas and Michael Brandt.