I dont think were going to see the building of the pyramids, EP Shawn Ryan said.

I dont think were going back to Greek mythology.

The farthest we go back to is the 1750s during the French-Indian war.

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Credit: Joe Lederer/NBC

Talk to me in season 3.

Part of keeping the storytelling in check comes in the rules of time travel on the show.

For instance, the characters cannot return to a time in which they already exist.

Thats a really hard rule for our show, Kripke said.

Frankly, its designed to keep a self-enclosed simplicity to it.

They cant redo the Hindenburg.

Its not so much that you hit a reset button…

If theyre not careful in episodes moving forward, theyre going to change more.

They have to start fighting to maintain things.

[Theres] this seismic change in history, but its completely personal and emotional.

Thats a pretty good model for how things will change in our show.

Should we keep it as-is or should we change things for the better?

The slick one is beautiful and is aesthetically really pleasing.

The lifeboat is like the Millennium Falcon.

Its rusty… and unreliable on when its going to work or not.

Because its the underdog, you root for it.

Timelessdebuts Monday, Oct. 3 at 10 p.m.