Directed by Matthew Rhys, this week’s episode of The Americans, “The Committee on Human Rights,” begins exactly where “Crossbreed” left off. But let me begin at the end, specifically with that haunting image of Gabriel (Frank Langella) and Philip (Rhys) seated across from one another inside the former’s apartment. Throughout this evocatively staged sequence that serves as a tribute to Gabriel’s work throughout the years in trying to keep Philip and Elizabeth (Keri Russell) well informed and grounded, my eye kept gravitating to a patch of white unpainted wall near Gabriel’s head. And my mind went to Kiyoshi Kurosawa’s Pulse, a film in which people leave behind splotchy black stains—redolent of the blast shadows of Hiroshima victims—on walls when they die, or simply go missing. That blackness is a symbol of all that’s inexplicable about our lives, just as the swath of unpainted wall here represents the one thing that Gabriel doesn’t come clean about throughout a profound unloading of his conscience: that he kept Mischa away from Philip.