As the new season of FX’s “The Americans” picks up where Season 3 left off — Philip has killed an FBI agent to protect the woman he’s married to under an assumed identity; daughter Paige has ratted out her Soviet agent parents to her pastor; son Henry is feeling so abandoned that he’s turned to neighbor (and perpetually suspicious FBI agent Stan) for fatherly guidance; and Elizabeth is as steely and determined as ever — it becomes increasingly clear that for the Jennings family, the center cannot hold.
If every successive season of the Cold War era drama-