Well, this caught us off guard. Netflix just announced a Black Mirror premiere, but it's not for the sci-fi series' highly anticipated fifth season. Instead, the streaming giant announced the stand-alone feature film Bandersnatch, starring Dunkirk breakout Fionn Whitehead.

There had been rumors and leaks online over the past week or two pointing to Black Mirror's next installment being a one-off special, but details about the plot and premiere date were scarce. We now know the 'Black Mirror event' will hit Netflix this Friday, December 28 – Yes, tomorrow.

The intense trailer contains the tag line, "Change your mind. Change your life. Change your past, your present, your future." We see video game maker Stefan, played by Whitehead, spiraling as he begins to question everything about life as he knows it. The official synopsis reads, "In 1984, a young programmer begins to question reality as he adapts a sprawling fantasy novel into a video game and soon faces a mind-mangling challenge. Welcome back."

It's been rumored that this might include the series' interactive "choose your own adventure" feature that Netflix teased this past October. If true, it's expected users would be able to use their remotes to choose the direction of the plot throughout the program.

The feature film was written by Black Mirror creator Charlie Brooker and directed by David Slade, who's directed past Black Mirror episodes as well as episodes of Breaking Bad, Hannibal, and more.

While we're sure this stand-alone film will be amazing, fans of the episodic series need not fret. Bandersnatch is not believed to be connected to season 5, which will likely still debut in the coming months of early 2019.

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