Perfection came to a screeching halt when Cillian Murphy spotted a single date that didn’t belong. While filming The Immortal Man, he noticed a 1942 propaganda poster on a 1940 set — and refused to continue. What followed was a frantic 24-hour rebuild of an entire street, proving Murphy guards Tommy Shelby’s legacy with razor-sharp precision.

Perfection took center stage during production of The Immortal Man when Cillian Murphy reportedly stopped filming after spotting a historical inaccuracy on set. According to crew accounts, Murphy noticed a 1942 propaganda poster displayed in what was meant to represent a 1940 street scene — a two-year discrepancy that prompted immediate concern.

The film, widely linked to the world of Peaky Blinders, sees Murphy reprising his iconic role as Tommy Shelby. Given the show’s reputation for meticulous period detail, even a small timeline error risked disrupting the authenticity that fans have come to expect.

Sources close to the production say Murphy raised the issue directly with the creative team, expressing concern that sharp-eyed viewers would quickly notice the mistake. Rather than adjust the shot digitally later, the decision was reportedly made to pause filming altogether.

What followed was an intense 24-hour effort by the art department to rebuild and redress the affected section of the street set. Designers replaced signage, corrected printed materials, and rechecked surrounding props to ensure consistency with the intended 1940 setting.

Industry observers note that such attention to detail is not unusual for high-budget historical productions, where accuracy contributes significantly to audience immersion. However, halting production can be costly, underscoring how seriously the team approached maintaining continuity.

Murphy has long been associated with a disciplined approach to character work, particularly when portraying Tommy Shelby. His insistence on historical precision reflects a broader commitment to preserving the tone and credibility that defined the original series.

Production has since resumed, with insiders describing the revised set as fully aligned with the film’s timeline. While minor on the surface, the correction highlights the level of scrutiny behind the scenes — and the dedication to getting every detail right.