Can you imagine The Americans without Frank Langella’s Gabriel, who’s emerged this season as the shoulder angel to Margo Martindale’s devil-like Claudia? This much is clear: Levity will be in shorter supply. In the opening of this week’s episode, “Crossbreed,” Elizabeth (Keri Russell) informs Gabriel of her almost certain belief that Alexei Morozov is trying to feed the world’s hungry, to which he replies: “Just like Miss America.” Gabriel, in the moment, seems completely unperturbed by the news, concerned less with the next stage of Elizabeth’s sleuthing than he is with Philip’s (Matthew Rhys) mental well-being in the wake of the lab director’s death. Gabriel may make room here and there for a good joke, but like the series itself for the last few episodes, he’s obviously burdened by the emotional collateral damage caused by spywork. “The same as me, it’s upsetting,” Elizabeth tells her handler after he asks her about Philip, and by the end of this finely detailed episode, she arrives at a place where those words come to actually feel true.