Ray (Dan Aykroyd)’s Timeline and Summary

He drafts Venkman to help him and Egon spot their first ghost.
Hesitantly, Ray mortgages his house to fund the Ghostbusters.
Dr. Stantz directs the other Ghostbusters in trapping Slimer.
He cracks the architectural code of Dana's apartment building.
Along with Winston, Ray ponders the place of God in all this.
Ray helps convince the mayor to let the Ghostbusters bust Gozer.
He accidentally gives Gozer the form of the Destructor by thinking of the Stay Puft Marshmallow Man.
With the rest of the Ghostbusters, he zaps Gozer back into another dimension.