MCCOY: What is this? Everything's all messed up and changed around, out of place.
UHURA: Captain, what's happened?
MCCOY: No, not everything. That spot, I spilt acid there a year ago. Jim, What in blazes is this?
KIRK: I don't know. It's our Enterprise but it isn't. Maybe
UHURA: Maybe what, Captain?
KIRK: Any of you feel dizzy when we were in the transporter beam?
UHURA: Yes.
SCOTT: Aye.
KIRK: When we first materialized.
SCOTT: I did.
KIRK: It happened twice. First we were in our own transporter chamber, then we faded, and then when we finally materialized, we were here. Wherever this is.
SCOTT: Captain, the transporter chief mentioned a surge of power. The transporter lock might have been affected by the ion storm and we just materialized somewhere else.
KIRK: Yes, here. Not our universe, not our ship. Something parallel. A parallel universe co-existing with ours on another dimensional plane. Everything's duplicated, almost. Another Enterprise. Spock with a beard.
UHURA: Another Captain Kirk, another Doctor McCoy, another
MCCOY: An exchange. If we're here
KIRK: Then our counterparts must have been transporting up at the exact same time. Similar storms on both universes disrupted the circuits. We're here, and they're on our Enterprise. Probably asking the same questions. Are we in another universe, and if so, how do we get back to our own?