Plot
{{empty section|date=December 2012}}
Characters
File:Real_Ghostbusters_Peter_Venkman.jpg%7Clink=Peter Venkman|
Peter Venkman{.wikilink}
File:Real_Ghostbusters_Egon_Spengler.jpg%7Clink=Egon Spengler|
Egon Spengler{.wikilink}
File:Real_Ghostbusters_Ray_Stantz.jpg%7Clink=Ray Stantz|
Ray Stantz{.wikilink}
File:Real_Ghostbusters_Winston_Zeddemore.jpg%7Clink=Winston Zeddemore|
Winston Zeddemore{.wikilink}
File:Real_Ghostbusters_Janine_Melnitz.jpg%7Clink=Janine Melnitz|
Janine Melnitz{.wikilink}
File:Real_Ghostbusters_Slimer.jpg%7Clink=Slimer|
Slimer{.wikilink}
Trivia
- The title of this episode is a reference to the form of joke, a Knock Knock joke.
- The reference of Egon being able to speak Sumerian is a nod to the first Ghostbusters movie. Gozer was a Sumerian god.
- A manhole cover in the episode says "Aija-Do", a Japanese animation company.
- This episode utilizes several sound effects from the Star Wars films, including a laser blast and lightsaber activation, deactivation and humming sounds.
Quotes
After Peter backed away from a pink-haired, skull-faced ghost.
:Peter Venkman: Say, now when was the last time you saw your dentist, hm?
After narrowly saving the world.
:Peter Venkman: That was great. Can we do it again?
:Doomsday Door: Do Not Open Until Doomsday!
:Peter Venkman: It was just an idea.
\
Referring to the writing on a stone tablet.
:Egon: It's Sumerian.
:Winston: Can you read Sumerian?
:Egon: In my sleep. Underwater with the lights off. Of course I can read Sumerian.
==Gallery== {{empty section|date=December 2012}}{=mediawiki}
{{Real Ghostbusters}}
{{Real Ghostbusters: Season 2|state=expanded}}
