In Episode 4, during the flashback to 11 months before Lucia's kidnapping, it is shown that someone is watching the Blix family while they are playing mini golf, but the identity of this person is not explicitly revealed in the episode.

Episode 4 reveals a shocking secret about Elisa, which contributes to the unraveling of years of lies surrounding the case, though the specific nature of Elisa's secret is not detailed in the available summaries.

During a radio interview seven weeks after Lucia's disappearance, Elisa faces tough questions about public criticism and her social media activity. She tries to defend herself but becomes overwhelmed by the accusatory tone and ultimately walks out of the interview.

Selma is actively pursuing the case, even at the risk of her career. She investigates leads, including paying a policeman for information and interviewing people at a commune, showing determination to solve the case despite obstacles.