Telltale's episodic Back to the Future games have been wonderful offerings of fan service. AJ LoCascio's portrayal of Marty McFly, in particular, helps cement the experience as an authentic continuation of the classic films. But, Telltale has one more secret to share: Michael J. Fox will be making an appearance in the final episode of the series, OUTATIME.

The developer isn't revealing exactly what character Fox will play, but apparently Marty has met this character in the original film series. Can you figure it out from the screen above?

The final episode will be available on PC and Mac on June 23. iPad and PS3 releases will follow shortly.