Patton Oswalt rewinds to the very beginning to explain how everything is connected in the Ghostbusters universe (before it was frozen).

Watch Ghostbusters: Afterlife before you see Ghostbusters: Frozen Empire: https://www.sonypictures.co.uk/movies...

Directed by: Gil Kenan
Starring: Paul Rudd, Carrie Coon, Finn Wolfhard, Mckenna Grace, Kumail Nanjiani, Celeste O'Connor, Bill Murray, Dan Aykroyd, and Ernie Hudson.