Benedict does not find out that Sophie is the Lady in Silver in Bridgerton Season 4 Part 1; as of the end of Episode 4, he is still unaware of her true identity.

Where the story leaves things (Season 4 Part 1)

  • The masquerade ball introduces Benedict to the mysterious Lady in Silver, who is actually Sophie Baek in disguise.
  • Sophie loses a white glove, which becomes Benedict’s only real clue to the Lady in Silver’s identity.
  • Later, Sophie ends up working at the Bridgerton house as a maid, while Benedict keeps searching for his masked mystery woman, not realizing they are the same person.

Does he ever realize in Part 1?

  • By the end of Episode 4, Benedict and Sophie share a deep emotional and physical connection, culminating in an intimate scene after he sketches her and rushes to her.
  • Even though he is clearly drawn to Sophie, he still has not connected her to the Lady in Silver; he even disastrously asks her to be his mistress rather than his wife.
  • Articles summarizing Part 1 explicitly state that Benedict “fails to discover” that Sophie is the Lady in Silver in these first four episodes, setting that reveal up for Part 2.

What about the books vs. the show?

  • In the novels, Benedict eventually realizes Sophie is the masked woman and is angry she hid the truth, but that full arc happens in the book narrative, not yet on screen.
  • Current show coverage and official pieces frame his realization as a key moment still to come in Season 4 Part 2, not something that has already happened.

Forum and fan speculation

  • Fan discussions are actively debating how he will realize the truth (through his drawings, her necklace, the glove, or some visual trigger), which also implies the reveal has not happened yet.
  • Many theories focus on Benedict sketching Sophie and suddenly seeing the Lady in Silver in her features, or recognizing her via an object linked to the ball.

So, if you’re watching only the released episodes: as of Season 4 Part 1, Benedict still does not know Sophie is the Lady in Silver; that reveal is being saved for later in the season.

TL;DR: He hasn’t found out yet in the show’s released episodes; the “when does Benedict find out Sophie is the Lady in Silver” moment is expected to happen in Season 4 Part 2, not Part 1.

Information gathered from public forums or data available on the internet and portrayed here.