Where does the season begin?Season 4 starts right where season 3s finale ended, Rothenberg says.

Clarke has just pulled the lever, she has saved the day [and] destroyed A.L.I.E.

(Erica Cerra) as her friends in the real world kept her alive long enough to do it.

Echoes

Credit: Diyah Pera/The CW

Trouble is, she knows the world will end.

But first, theyll have to deal with a changing of the guard at Polis.

What will the second Doomsday be like?In a word?

Echoes

Diyah Pera/The CW

The story becomes mans inhumanity to man, and mans humanity to man… Can you transcend that?

Or will you figure out a way to link arms and become one people?

Clarke is an idea person, shes always looking for a third way.

Echoes

Diyah Pera/The CW

Bellamy, meanwhile, will struggle with his guilt.

Thats something that still haunts him, certainly, and now hes given a second chance, Rothenberg says.

Were not going to tell the story differently.

Echoes

Diyah Pera/The CW

Thats the kind of world that it is and will always be.

The 100returns Wednesday, Feb. 1, at 9 p.m.

ET on The CW.