The Intruder Season 1 Episode 4 Airs October 18 2025 on BBC Four

The upcoming episode of “The Intruder,” airing at 10:35 PM on Saturday, 18 October 2025, promises to be a gripping installment in the series. In Season 1, Episode 4, viewers will see Paula hot on the trail of Tess. As Paula digs deeper into Tess’s past, she uncovers unsettling truths about the young woman. The more Paula learns about Tess’s childhood, the more she suspects that Tess may not be who she claims to be. This revelation raises questions about Tess’s intentions and her connection to the Martel family.

At the same time, Camille is feeling increasingly uneasy at home. With Paula away, Tess seizes the opportunity to strengthen her foothold within the family. Camille’s discomfort grows as she watches Tess navigate family dynamics, leaving her to wonder what Tess’s true motives are. The tension is palpable as Camille tries to make sense of the situation while feeling sidelined.

This episode is set to deepen the mystery surrounding Tess and her relationship with the Martel family. As Paula continues her investigation, the stakes rise, and viewers will be left wondering how far Tess will go to achieve her goals. The blend of suspense and family drama makes this episode a must-watch for fans of the series.

Release Date & Time: 10:35 PM Saturday 18 October 2025 on BBC Four

The Intruder Cast – Season 1 Episode 4