The impressive voice cast has been announced for the upcoming video game LEGO Dimensions in the form of a new preview video.

While the cast is huge, it’s a specific part of the cast that’s particularly exciting. Among all the names, none other than Michael J. Fox is in the game, reprising his role as Marty McFly from Back to the Future. He’s also joined by co-star Christopher Lloyd, who of course voices Emmett “Doc” Brown. If you recall a handful of years ago, Telltale made their own episodic Back to the Future game, but Fox was unable to record for the game at the time, leading to them bringing in a surprisingly accurate impressionist for the job.

You can read a rundown of who joins Fox and Lloyd on the cast, including stars of The LEGO Movie, Doctor Who, Portal, and more, and also watch the voice cast announcement video below.

The dry wit of the evil artificial intelligence GLaDOS, voiced with perfect acerbic delivery by actress Ellen McLain, is one of the high points of the Portal video game series. Now GLaDOS has found new purpose as a teaching tool via NASA to discuss the differences between nuclear fusion and fission energy, with McLain returning to provide the distinctive voice. Make no mistake about it, even though this is about learning, GLaDOS is still very much evil!

Check out the full video below.