- Dr. Walter Bishop: I've given him a name, Carla.
- Dr. Carla Warren: Hmm?
- Dr. Walter Bishop: Walternate.
- General Hames: You're gonna make some sort of alternate Manhattan appear?
- Dr. Walter Bishop: It's already there, General Hayes. Dr. Warren. At all times. Right in front of our eyes. We just can't see it.
- Dr. Walter Bishop: The Casimir Effect should produce a thinner, more porous region of space-time. I only need to affect the area for long enough to cross over to the other side with the vial of the cure. And... and then, of course, recreate the effect to cross back again.
- Dr. Carla Warren: Walter, you're trying to create a wormhole into another universe?
- Dr. Walter Bishop: Yes! I think I just said that.
- Dr. Walter Bishop: It was the first hole, Olivia. The first breach. The first crack in a pattern of cracks, spaces between the worlds. And it's my fault.