When an assassin attempts to kill President Reagan, Philip and Elizabeth scramble to handle the fallout within the KGB. Meanwhile, Stan pressures his source within the Rezidentura to find out if the KGB was responsible for the attempted assassination.

Philip and Elizabeth are finally assigned a new handler as Philip works to clean up the mess of the last operation and Elizabeth, in disguise as Clark's sister Jennifer, does her best to smooth things over with Martha. As Stan searches for a missing scientist, Oleg and Arkady continue to argue over how best to handle the situation on their side, leaving Nina once again caught between the FBI and KGB.

A dangerous Naval officer becomes the key to Philip and Elizabeth’s mission as well as a potential threat to their family's safety. Lucia, a Sandinista intelligence officer working with the Jennings, is tasked with getting Elizabeth access to Capitol Hill. Stan struggles with the potential costs of protecting Nina.

A new mission with international stakes has Philip calling on Annelise for assistance just as an old foe returns to D.C. with a vendetta. Stan makes a discovery that could put the FBI hot on the trail of illegals.