"The Gozer incident is a commonality across- oh-" John flicks the thumbwheel on the side of his PDA. "Four universes, possibly five. In one universe, the Shandor Building was dedicated to the Sumerian death goddess Ereshkigal instead." He glances up from the device. "Every other Shandor Building incident that the Ministry is aware of involved one or more of the Great Old Ones. The part where they're a year ahead, though- that helps."

More thumbwheel flicking.

"If only because in nearly every other universe in which the Ghostbusters existed, they've either retired for health reasons or been killed in the line of duty by now."