Not only does these episodes give us a chance to see some our favourite movie heroes back to together, they are also raising money for a different charity each episode.
So far we have had the pleasure of seeing reunions for The Goonies, Back to the Future, Splash and Lord of the Rings (which at the end gave a teaser for the next episode!).
That's right - Ghostbusters is next and, as the trailer shows, Josh has been able to do grab Murray, Aykroyd, Hudson, Potts, Weaver and both Ivan and Jason Reitman (and who knows who will be in the wings for a surprise!).
We can't be more excited to watch this when it drops onto YouTube on June 15th!