They don wigs, come up with aliases, and occasionally retreat to safe houses.
And from time to time, theyre forced to pull off disturbing tasks.
You cant up [the violence], Weisberg tells EW.

Credit: Eric Liebowitz/FX
At least,wecant.
Weve hit bottom, or reached our ceiling, whichever way you look at it.
After all, the suitcase scene was harrowing enough to dream up.
And he looked at me and said, What are youtalkingabout?
Still, dont expect season 4 to skimp on shockers just because its hard to top the crack-and-pack.
Im done, Fields recalls.
Were nottryingto create these shocking moments.
We cant help what Philip and Elizabeth have to do.
The Americansreturns March 16 at 10 p.m.