The season opens with Dexter Morgan grappling with the aftermath of the events from the previous season, particularly the death of his brother, Brian. He is now more aware of the consequences of his actions and the impact they have on his family, especially on his son, Harrison. Dexter is trying to balance his life as a father and his dark urges as a vigilante serial killer. He continues to work at Miami Metro Police Department, where he is still a blood spatter analyst.

Dexter's sister, Deborah Morgan, is dealing with her own trauma after the revelation of Dexter's true nature. She is conflicted about her feelings for him, both as a brother and as someone who has committed heinous acts. As she tries to process this, she becomes increasingly focused on her career, determined to prove herself as a capable detective. Her ambition leads her to take on a high-profile case involving a new serial killer known as the "Doomsday Killer," who is leaving a trail of gruesome murders across Miami.

As the investigation into the Doomsday Killer unfolds, Dexter becomes intrigued by the case. He sees parallels between the killer's methods and his own, which reignites his dark urges. Meanwhile, Deborah is struggling with her feelings of betrayal and confusion regarding Dexter's secret life. She begins to suspect that Dexter may have more knowledge about the case than he is letting on, leading to tension between the siblings.

The Doomsday Killer, revealed to be a man named Travis Marshall, is a deeply religious individual who believes he is carrying out God's will through his murders. He is accompanied by a mentor figure, Professor Gellar, who is later revealed to be a figment of Travis's imagination. Dexter, while investigating the case, discovers that Travis is using biblical themes to justify his killings, which leads him to confront his own moral compass.

As Dexter delves deeper into the case, he begins to form a plan to stop Travis. He uses his skills to track him down, but the investigation becomes complicated when Deborah discovers Dexter's secret life. In a pivotal moment, she confronts him about his past and the truth about his killings. This confrontation leads to a rift between them, as Deborah struggles to reconcile her love for her brother with the horror of his actions.

In a series of intense encounters, Dexter and Travis engage in a cat-and-mouse game. Dexter learns that Travis is planning a final, grand act of murder that will culminate in a public display. Dexter races against time to stop him, leading to a dramatic showdown. In a tense confrontation, Dexter manages to overpower Travis, but not before Travis reveals that he has taken Harrison hostage, using him as leverage against Dexter.

The climax of the season occurs when Dexter must choose between saving his son and killing Travis. In a heart-pounding sequence, Dexter ultimately decides to save Harrison, leading to a brutal fight where he kills Travis in a fit of rage. This act solidifies Dexter's commitment to his dark path, but it also deepens the divide between him and Deborah, who is left to grapple with the implications of Dexter's actions.

As the season progresses, Dexter's relationship with Deborah becomes increasingly strained. She is torn between her duty as a detective and her loyalty to her brother. The season ends with Deborah making a shocking decision to cover up Dexter's actions, further complicating their relationship and setting the stage for future conflicts. The final moments leave viewers with a sense of foreboding, as Dexter's dark secret remains hidden, but the consequences of his choices loom large over his family.

In the ending of "Dexter" Season 7, Dexter Morgan finds himself in a precarious situation as he confronts the consequences of his actions. The season culminates in a tense showdown between Dexter and the antagonist, Hannah McKay, as well as the looming threat of the law closing in on him. The season concludes with Dexter making a significant decision regarding his future and the safety of his loved ones.

As the final episodes of Season 7 unfold, the tension escalates. Dexter Morgan, portrayed by Michael C. Hall, is grappling with his feelings for Hannah McKay, played by Yvonne Strahovski, who is a former accomplice in murder. Their relationship is complicated, as Dexter is torn between his dark urges and his desire for a normal life.

In the penultimate episode, Dexter's sister, Deborah Morgan, played by Jennifer Carpenter, is increasingly suspicious of Hannah. She is also dealing with her own emotional turmoil, having discovered the truth about Dexter's dark secret. The stakes are raised when Hannah is arrested, and Dexter must navigate the dangerous waters of protecting her while also keeping his own identity as a vigilante killer hidden.

The climax occurs when Dexter learns that the law enforcement is closing in on him, and he must make a choice. In a pivotal scene, he confronts Hannah in a tense moment where he must decide whether to let her go or eliminate her to protect his own interests. The emotional weight of this decision is palpable, as Dexter reflects on his past and the implications of his actions.

In the final moments of the season, Dexter's world begins to unravel. He realizes that he cannot maintain the facade of a normal life while being true to his nature. The season ends with Dexter making a drastic decision to protect his son, Harrison, and his sister, Deborah. He chooses to distance himself from them, believing it is the only way to keep them safe from the darkness that surrounds him.

Deborah, who has been a steadfast ally and protector, is left devastated by Dexter's choices. The season closes with a haunting image of Dexter, alone and isolated, as he contemplates his future. The fate of each main character is left in a state of uncertainty, with Dexter's path leading him further into darkness, while Deborah is left to grapple with the betrayal of her brother and the implications of his actions.

In summary, the ending of Season 7 leaves viewers with a sense of foreboding, as Dexter's dual life continues to spiral out of control, and the relationships he holds dear are put to the ultimate test.

In "Dexter" Season 7, there is no post-credit scene following the episodes. Each episode concludes without any additional scenes or content after the credits roll. The focus remains on the main storyline and character development throughout the season, with the narrative wrapping up at the end of each episode without any extra material.

"Dexter" Season 7 contains several scenes and themes that may not be suitable for children or sensitive viewers. Here are some potentially objectionable aspects:

1. Graphic Violence: The show features scenes of murder and bloodshed, often depicted in a graphic manner. Dexter, the main character, is a vigilante serial killer, and his methods can be quite brutal.

2. Mature Themes: The series explores complex themes such as morality, justice, and the nature of evil, which may be difficult for younger audiences to understand.

3. Sexual Content: There are scenes that include sexual situations and adult relationships, which may not be appropriate for younger viewers.

4. Strong Language: The dialogue includes frequent use of strong language and profanity.

5. Psychological Tension: The show often delves into psychological horror and suspense, which can be unsettling and intense.

6. Mature Relationships: The dynamics between characters can involve manipulation, betrayal, and emotional distress, which may be upsetting for some viewers.

These elements contribute to the overall tone of the series, making it more suitable for mature audiences.