The 28 days later The zombie franchise has always had a knack for combining suspense and horror with mystery, and the latest installment looks to be no exception to that rule.

The trailer for 28 years later, released on YouTube on Tuesday, has fans wondering if Cillian Murphy, the Oscar-winning actor who starred as Jim in the original film, is making an undead comeback.

Fans quickly noticed that Murphy apparently wasn’t on the cast list, despite his role as executive producer.

But a tongue-in-cheek moment in the trailer, in which a very familiar-looking zombie sits up, lacking Murphy’s signature piercing blue eyes but still blessed with a remarkably well-defined jaw despite undeniably difficult circumstances, sent us Murphy’s huge online fan base is pushing its way onto social media.

Columbia Pictures declined to comment The Hollywood Reporter (which of course only fueled more speculation).

For those unfamiliar with this particular version of the apocalypse: Danny Boyles 28 days later (2002) redefined the zombie genre with its depiction of societal collapse. Written by Alex Garland, the film follows Jim (Murphy), a courier who awakens from a coma to find London eerily empty and frighteningly overcrowded.

The sequel, 28 weeks later (2007), directed by Juan Carlos Fresnadillo, expanded the story but Murphy’s character was missing.

There’s great excitement among fans of the cult classic that Boyle is back in the director’s chair nearly two decades later, once again teaming up with Garland 28 years later Designed to evoke the original’s more haunting style, it examines how humanity has evolved nearly three decades after the outbreak.

Early signs suggest things aren’t going too well, as the survivors appear to be carving out a rough life in the wilderness and having to fend off relentless hordes of infected. IMDB listings show the new cast includes Jodie Comer, Aaron Taylor-Johnson and Ralph Fiennes, but since Murphy isn’t listed beyond an executive producer role, his zombie cameo is probably just a special Easter egg for die-hard fans.

As for Murphy, his schedule is busy and he will be returning as Tommy Shelby next year Peaky Blinders Film that was critically acclaimed Little things like this, and even the revival of a historic cinema in County Kerry in his native Ireland.