Warning: Spoilers ahead for Silo season 2, episode 4, “The Harmonium.”Steve Zahn’s Silo character, Solo, unknowingly confides with Juliette Nichols in “The Harmonium,” but sharing his past with Rebecca Ferguson’s character results in him perhaps being more open than he intended to be. A recent addition to the Silo cast, Zahn’s character has so far been framed as the lone occupant of Silo 17 – an exact replica of the home Juliette left behind when she was sent out to clean. While very little was revealed about Solo during his earlier appearances, the audience is quietly taught more about him by the end of Silo season 2, episode 4, “The Harmonium.”

https://screenrant.com/what-is-solo-hiding-from-juliette-in-silo-classroom/