In the lab, Carter retraces their steps up until the point where Tess tripped on that panel on the floor, at which point the background music picks up so you know it's important. They realize that if Tess could trip over the panel without walking through it, then it must be in whatever their reality is. Carter thinks it's a miniature version of the larger light pad they stepped on and looks around for anything else that they can interact with. Tess hopes for some tequila. God, Tess, shut up about beverages already! Carter soon spots a pair of legs on the floor behind a control panel. They belong to the unconscious Dr. H.J. Johnson, the man who runs the lab and told everyone he was traveling for a few days. And travel he did -- right to wherever they are now. Anyway, aside from some superficial burns, Johnson is fine, but since he's still out, not currently helpful. Carter checks out the panel again, and Tess decides it's a "portable re-entry pad." Basically, it's the doorway from wherever they are back to their dimension. Unfortunately, it appears that Johnson didn't calibrate it correctly, so when he tried to use it it sent him flying across the room.
Carter finds it awfully strange that Tess seems to know this much about what happened based on so little information, and she admits that she knows more than she admitted because it's a secret S5 project Carter wasn't supposed to know about. Carter points out that he can't exactly tell anyone else so she might as well spill it. It turns out that Johnson wasn't working on alternate propulsion, but on finding a way to access the fifth dimension. "He must have figured out a way to cross over using his P-branes," she says. No, Carter, not "pea-brains." P-branes, the theoretical membrane barrier between dimensions, as Tess explains. Anyway, Tess and Carter should just be happy that Johnson accessed the fifth dimension and not, say, the second. That place lacks a lot of depth, from what I've heard. Tess thinks the fact that they're called "P-branes" indicates that science has a sense of humor. It doesn't. [See: T.I.R.D.s. - Z] Anyway, it looks like Johnson found a way to use subatomic vibrations to make a doorway into the fifth dimension. He took the portable re-entry pad into the fifth dimension with him so he'd be able to get back, but that obviously didn't work. Tess says that if you don't get the calculations right, you'll just make the P-brane sort of wiggle rather than get through it. Carter says that wiggling could get Drechmeyer's attention and save them from being stuck in the fifth dimension forever. "You're smarter than you dress," says the woman who wears high-heeled boots, which aren't exactly the shoes of intelligence either.