Oíche Shamhna: An Ancient Mystery (Documentary, Irish)
Status: Ended
Premiered: 2025-10-26
Ended: 2025-10-27
Network: RTÉ ONE
Country: IE
Airs on: Monday, Sunday
Air time: 19:30
Runtime: 60 minutes
Exploring mythology, archaeology and science, this series reveals Halloween's ancient origins in Ireland.