Brian Dietzen Shares the Update Fans Never Expected to Hear, and it’s changing how viewers see his journey on NCIS. Known for his warmth and resilience as Jimmy Palmer, Dietzen’s real-life revelation brings fans even closer to the man behind the beloved character. The update has sparked emotional reactions as fans revisit key Palmer moments with new understanding. His growth on the show reflects more personal strength than many realized, giving his performance even greater meaning. Cast members