“Ghostbusters: Afterlife” hits theaters TODAY.  It’s written and directed by Jason Reitman, the son of the original director, and it focuses on the grandkids of Egon Spengler.  He was played by Harold Ramis, who passed away in 2014.  The cast includes Paul Rudd, “Stranger Things” star Finn Wolfhard, and all the surviving Ghostbusters.