Is Oíche Shamhna: An Ancient Mystery coming back?

Oíche Shamhna: An Ancient Mystery ended on October 27, 2025, on RTÉ ONE. The series was a documentary exploring the mythology, archaeology, and science behind Halloween's ancient origins in Ireland. It delved into the historical and cultural significance of the holiday, revealing how traditions have evolved over time. Oíche Shamhna: An Ancient Mystery was a one-season series that aired in 2025. It consisted of two episodes that examined the roots of Halloween through expert interviews, archaeological findings, and historical analysis. The show aimed to provide viewers with a deeper understanding of Ireland's rich cultural heritage related to the holiday.