It’s official, Ghostbusters 3 is being worked on as we speak. So, before it’s too late, we’d like to point writers Lee Eisenberg and Gene Stupnitsky to our checklist of elements that make Ghostbusters Ghostbusters.

Boys, if any of the following are missing, we’re going to set Stay Puft on you…

7. A bit where the Ectomobile goes ‘Waa, waa!’ as it bursts out of the fire station

Ecto-1's siren is as iconic as the Ghostbusters theme tune and you can sing along to it just as easily.

After Columbia has signed up the original actors, they need to make sure they’ve locked-down the sound effects wizards. If they’re not available, we’re sure we can approximate the sound using our voices alone, for a small fee.

6. A genuinely scary bit

One of the things people often forget when they’re giggling at the memory of the gags in Ghostbusters is that – at times – both films were genuinely scary.

Whether it’s the ghost in the library jump-fright in Ghostbusters, or the creepy buggy bit in Ghostbusters 2, Ghostbusters 3 needs its own scare moment. Or, ideally, moments.

5. A bit where Egon Spengler says something really geeky

Ghostbusters:
Janine Melnitz: “You're very handy, I can tell. I bet you like to read a lot, too.”
Dr. Egon Spengler: “Print is dead.”
Janine Melnitz: “Oh, that's very fascinating to me. I read a lot myself. Some people think I'm too intellectual but I think it's a fabulous way to spend your spare time. I also play raquetball. Do you have any hobbies?”
Dr. Egon Spengler: “I collect spores, molds, and fungus.”

Ghostbusters 2:
Peter Venkman: “Hi, Egon. How's school? I bet those science chicks really dig that large cranium of yours, huh?”
Egon: “I think they're more interested in my epididymis.”

‘Nuff said.

4. A bit where Slimer slimes someone

We don’t just want to see Slimer in Ghostbusters 3, we want to see him do what he does best, covering our heroes in Ectoplasm.  Oh, and if Bill Murray signs-up (see 2 on our list) we want to see a moment pass between him and his old green pal.

3. A bit that demonstrates how cool the proton packs are

Let’s face it, we all wanted a Proton Pack at some stage during our childhoods and not a toy one, either.

That’s because they are the coolest nuclear weapons of all time and we need a scene that shows off how bad-ass they can be. Just don’t cross the streams (unless the plot requires it).

2. A bit where Bill Murray says something really sarcastic

Notice how we didn’t say ‘Peter Venkman’ there?

Don’t get us wrong, we’d like to see every ‘Buster pull their jump-suit back on for the sequel, but Bill Murray is the only actor who has to return to make this a success.

No-one delivers a put-down like Murray – we need to see him with a proton pack strapped to his back, training a gang of new recruits.

1. The theme song, unchanged

We don’t want a remix, a cover version or a rap re-imagining, we want Ray Parker Jr’s original song, untouched. If it was good enough for our school disco, it’s good enough for Ghostbusters 3.