Tracy Spiridakos, the actress who played Detective Hailey Upton on NBC's 'Chicago P.D.' for seven years, has revealed the challenges of transitioning to her new role as Anna Pigeon, a national parks ranger, in the upcoming TV show based on Nevada Barr's book series. Spiridakos shared that she had to 'unlearn' her habits and behaviors ingrained in her from playing Hailey, as the training and mindset of a police officer differ significantly from that of a park ranger. This shift in perspective is not only a physical transformation but also a mental one, as Spiridakos had to adapt to the new demands of her character. The actress expressed her excitement for the role, citing Anna's unique blend of humor, edginess, and impulsiveness as captivating. However, the transition was not without its hurdles, as Spiridakos had to unlearn habits formed during her time on 'Chicago P.D.' and embrace the nuances of Anna's character. This experience highlights the challenges and rewards of an actor's career, where the ability to adapt and grow is essential. As Spiridakos navigates her new role, she brings her experience and talent to create a compelling character in Anna Pigeon, offering a fresh perspective on the world of national parks rangers. Her journey from Hailey Upton to Anna Pigeon is a testament to her versatility and dedication to her craft, leaving fans eager to see her in action.