17+ View Photos of Brian Geraghty
17+ View Photos of Brian Geraghty. He currently stars as ronald pergman on the abc drama big sky. He is perhaps best known for his recurring role in chicago pd. He's nabbed lead roles in shows like the alienist, briarpatch, and the fugitive. Here's what we know about his departure. He has previously enjoyed being a surf instructor and continues to surf in his free time.
