Original article by Donald L. Spidel, adapted by Owen E. Oulton. Originally published in The Dungeoneer's Journal, February/March 1981


This Tesseract is unlike that featured in the Avengers movies. While that one was one of the six Infinity Stones, known originally in the comics as the Cosmic Cube, this one is an actual mathematical concept - a tesseract is a four dimensional hypercube such that the cube has a cube on all six of its faces with all of the faces joined and the whole fitting into a cube no larger than the central cube.

Figure 1: A Tesseract.


Really, it is mathematically possible for such an object to exist, but don't rely on me for proof (see: Tesseract). In Star Trek, they are the result of a sub-space fold...

In the maps, you see the room complex unfolded and labelled. You will notice two things right off. First, the floor the adventurers are using at any one time may be someone else's wall or ceiling. Second, there are many more doors in each room than our adventures saw. Why didn't they see the other doors?

The doors are always there. However, they lead in directions the eye cannot follow and the mind cannot accept. Therefore, the natural censor in our brains blocks them out. It works just like a blind spot. If they want to figure out where these doors are, you could allow a Vulcan mathematician or sub-space physicist with a temporal tricorder to detect most or all of the doors if he or she was looking for them. However, I don't allow it in my universe. If they could see the doors, they might want to try them. That could get complicated.

There are only four entrances to the Tesseract as seen here. Two more entrances are possible by starting from the top (down into III-A) and from the bottom (up into I-A). The main four ground floor entrances are shown on figure 2. The numbers you see are the numbers of the internal doors. Door number 1 in Room IV-A is door number 1 in Room VII-A, just as if the two walls and the two doors were the same. They are the same. There is no space there. You can go through these five rooms and in or out of the four exits with no problem. You remain upright and walking on the floor. However, if you take the stairs, things get complicated.

For example, Dr. McCoy is standing on surface III-F. If Capt. Kirk takes the steps up from II-A, he and Spock would have the problem of trying to convince McCoy that he was on the ceiling in order to get him to join them. But he could feel the gravity holding him to the "floor," so it would be obvious to him that they were on the ceiling. You can also add furnishings to the rooms to further confuse things, and then decide whether a person standing on V-E, for instance, could see a chair or table standing on V-A or V-C or V-F. I hope you have fun getting your friends lost in this one.

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This page and new contents ©2009, 2016 Owen E. Oulton.
Cutaway, Covers and Original Plans ©1981 Gamescience Corporation