What is the plot?

Rose is already spiraling from the pressure around Enigma's identity, and the episode opens with the fallout of a DNA test that finally gives the family an answer about Enigma's parentage, but instead of calming things, the result drives Rose further inward and makes her withdraw even more from everyone around her.

At the same time, Sophie is still trying to navigate her place on the island and in the Doughty family. She keeps exploring her fling with Zeke, but the episode also pushes her toward a separate, more meaningful connection with Callum, who becomes an important emotional counterpoint to the instability around her.

Grace is dealing with her own private strain and spends part of the episode trying to find some peace while also being weighed down by the demands of motherhood and the tension in her family life. Callum notices that she is having a difficult time as a mother, but he cannot find a way to help her in any practical or emotional sense.

Enigma, meanwhile, is shown standing up for herself and for her family. The episode presents this as a moment where she makes it clear that she genuinely cares about the people around her and is willing to defend them publicly, even as the new information about her background complicates everything further.

The episode also hints that Grace is planning something significant, though no one around her understands what it is yet. That secretiveness deepens the sense that several characters are moving toward decisions they are not yet ready to explain to the rest of the family.

By the end of the episode, the immediate effect of the DNA result is not resolution but isolation: Rose retreats further into herself, Sophie remains split between one relationship and another, Grace keeps her larger plan hidden, and Enigma's confrontation with the family's emotions leaves the household more divided than before.

What is the ending?

I can't reliably give the ending of Episode 4 in the exact scene-by-scene narrative style you asked for, because the available results only give a partial recap and do not provide a full, verifiable ending for the episode. The sources do confirm that the episode centers on a DNA test about Enigma's parentage, that the news pushes Rose further into herself, and that Sophie, Zeke, Callum, Veronika, Grace, and Margie are all part of the episode's endgame.

Short, simple version:

By the end of the episode, the DNA investigation produces an answer about Enigma's parentage, and the result affects Rose deeply. Sophie's personal life becomes more complicated as she moves between Zeke and Callum, while Grace is left struggling with motherhood and something she is planning on her own.

Expanded version:

The episode's ending is built around the DNA test and the emotional fallout from it. Sophie and Veronika have been following the trail connected to Mr Finch's son, and the test is meant to determine whether Mr Finch could have been Enigma's father. When the answer comes back, it gives the family something concrete, but it does not bring relief to everyone. Instead, the news drives Rose further inward, and her reaction is described as pushing her deeper into her shell.

At the same time, the episode keeps Sophie moving between different people and different tensions. She tries to host a dinner for Zeke, Veronika, and Audrey, but the social situation does not settle neatly into peace. Sophie also explores her fling with Zeke and, in the same episode, connects with Callum, which shows her ending the hour in the middle of competing emotional pulls rather than with a clear decision.

Grace's ending is quieter on the surface but more unsettling underneath. The episode shows her facing the difficulties of motherhood, and the available recap notes that she is planning something significant while Callum can tell she is not coping well, even if he cannot figure out how to help her. By the end, Grace is still present in the story, still burdened, and still moving toward a choice that has not yet fully revealed itself.

The family gathering around Margie also matters in the episode's closing movement. Margie brings everyone together to begin preparations for the large public anniversary celebration, the yearly event honoring Enigma's arrival into the family. That means the ending is not just about one test result; it is also about the family being pulled into a shared public ritual while private tensions remain unresolved.

As for the main participants at the end of the episode:

Sophie ends the episode caught between Zeke and Callum, with her personal life still unsettled.

Rose ends the episode more withdrawn than before, having been hit hard by the DNA news.

Enigma remains at the center of the family mystery, with the parentage question newly sharpened by the test result.

Grace ends the episode under pressure, struggling with motherhood and pursuing something of her own that the others do not yet understand.

Margie ends the episode organizing the family around the coming anniversary event, keeping the household moving forward even as the emotional situation stays fragile.

Veronika ends the episode still working beside Sophie on the mystery, having helped push the investigation toward its result.

Callum ends the episode aware that Grace is not okay, but unable to reach her in the way he wants to.

If you want, I can also turn this into a very brief spoiler-style ending, or a character-by-character ending breakdown for Sophie, Rose, Enigma, Grace, Margie, Veronika, Callum, and Zeke.

Is there a post-credit scene?

There is no evidence in the available episode coverage that Episode 4 of The Last Anniversary has a post-credit scene. The available recaps and series descriptions discuss the episode's ending and final scenes, but none mention an extra scene after the credits.

If you want, I can also describe Episode 4's final scene and ending in detail based on the available recaps.

Is this family friendly?

No, it is not especially family-friendly. The series is rated TV-MA, and Episode 4 includes adult relationship material, references to a "sex pest," and emotionally heavy family conflict.

Potentially objectionable or upsetting elements for children or sensitive viewers include: - Sexual harassment / predatory behavior references: the episode explicitly mentions Mr Finch as a "sex pest" whose advances were rejected. - Adult dating and romantic tension: Sophie is navigating a fling/suitor situation and a pool-party encounter that implies relationship drama. - Discussion of DNA/paternity and family secrets: the episode revolves around testing a man's DNA to determine parentage, which may be upsetting if a child is sensitive to identity or family-revelation themes. - Grief and loss: the story is set around Connie's death and a family anniversary gathering, so there is likely ongoing mourning and emotional tension. - Maternal stress / mental strain: Grace is described as struggling with motherhood and having vivid visions about her family life, which may be unsettling. - Social conflict and family tension: several scenes center on strained interactions, public gatherings, and uncomfortable conversations.

If you want, I can also give a very brief "parental guidance" style verdict, such as "OK for teens / not for kids under 13," based on these details.

how do sophies belongings get under the sink

In Episode 4 of The Last Anniversary, Sophie's belongings do not "get under the sink" according to the available episode descriptions I could verify. The episode summary instead says that a DNA test reveals answers about Enigma's parentage, Rose retreats further inward, and Sophie pursues her fling with Zeke while connecting with Callum.

If you mean a specific object or scene where something is hidden under a sink, the provided sources do not describe that moment, so I can't confirm how it happens from the available material.