Searxng/Firefly TV show tv Celebrity Firefly cast reunites after 20+ years! Nathan Fillion teases major announcement at AwesomeCon. Is a revival finally happening? March 13, 2026 AceShowbiz - More than two decades after Firefly first aired and was abruptly canceled, fans are buzzing as Nathan Fillion has begun reuniting the beloved cast once again. Over recent weeks, Fillion has used the Instagram account for his podcast, Once We Were Spacemen, to visit each main cast member individually, teasing an upcoming announcement scheduled for Sunday, March 15th.