The "28 Years Later" trailer is here, and fans think a split-second shot may have revealed Cillian Murphy's unexpected role.

Days Later also became the driving vehicle behind Murphy's career success, with Murphy playing courier-come-survivor Jim in the franchise's first outing. Despite the movie's success and an overwhelmingly positive reception to Murphy's performance,

"28 Years Later," the long-awaited sequel to "28 Days Later" finally has a trailer and movie release date. Does Cillian Murphy return? What we know.