Pretending for a moment that Larry King doesn't know anything about particle physics, dimensions, or planes of existence, Dan Aykroyd recently told Larry King what the hell is going on with Ghostbusters 3.
Though the typically too-vocal actor hasn't been talking about the sequel much as of late, it's apparently still going to happen, even though Bill Murray is still a decided "no" for returning. Aykroyd didn't get into a lot of the details of the script, or offer any casting possibilities beyond Larry King reprising his role as himself, but did hint that the film could reference actual science that has more support than the "kill a painted ghost, you replace him in the painting" theory of Ghostbusters 2.
King responded, "You believe in this?" All these years later, still skeptical of "ghost busting" and "research."
"Well, I believe in science. I believe in entertainment," Aykroyd continued, "And I think to contemplate the ideas of ghosts and survival of the consciousness, it's very, very entertaining.
"Basically, there's research being done that... I can say that our world, our dimension that we live in, our four planes of existence--length, height, width, and time--become threatened by some of the research that's being done. And Ghostbusters--new Ghostbusters--have to come and solve the problem."
Then all the skeptics were quickly quieted and became enthusiastic, because no one had told them length was going to involved in this thing.