Monster (American TV Series): Seasons, True Story & Cast

When Netflix debuted a series called Monster in 2022, many viewers braced for a conventional horror anthology. Instead, they got a biographical crime drama that lingers not on jump scares but on the uncomfortable psychology behind real-life atrocities — this guide walks through what the series covers, how it handles its true-crime source material, and what fans can expect next, season by season.

Creator: Ryan Murphy and Ian Brennan ·
Network: Netflix ·
Premiere date: September 21, 2022 ·
Current seasons: 2 ·
Genre: Biographical crime drama anthology ·
Notable season: Dahmer (2022)

Eight key specs, one quick reference:

What is the Monster American TV series about?

Core premise

• Monster is a biographical crime drama anthology that re-examines high-profile American homicide cases. Each season focuses on a single criminal or case, weaving together courtroom transcripts, victim perspectives, and psychological profiles. (Netflix, official streaming platform)
• The series deliberately avoids glorifying the perpetrators, instead centering the damage inflicted on victims and communities. (Netflix Tudum, Netflix’s editorial publication)

Anthology format

• Each season is self-contained, with a separate cast, setting, and storyline. Viewers can watch any season without having seen the others. (Wikipedia, community encyclopedia)
• Season 1 is titled Dahmer — Monster: The Jeffrey Dahmer Story; Season 2 is Monsters: The Lyle and Erik Menendez Story. (Netflix Tudum, Netflix’s editorial publication)

Creator background

• The series was co-created by Ryan Murphy and Ian Brennan, who previously collaborated on Glee, Scream Queens, and The Politician. Murphy is known for his anthology work on American Horror Story and American Crime Story. (Netflix, official streaming platform)

The implication: Murphy and Brennan are using the anthology structure they perfected in American Crime Story to tackle true-crime material, but with a darker, less glamorous lens. The format allows them to pivot from serial killers to family murders while keeping the core editorial question intact: what creates a monster?

How many seasons of Monster are on Netflix?

Season 1: Dahmer

• Premiered September 21, 2022 on Netflix. (IMDb, film database)
• 10 episodes, starring Evan Peters as Jeffrey Dahmer. (Netflix Tudum, Netflix’s editorial publication)
• Focuses on Dahmer’s crimes between 1978 and 1991, the failed police interventions, and the impact on victims’ families.

Season 2: The Menendez Brothers

• Premiered September 19, 2024 on Netflix. (Wikipedia, community encyclopedia)
• 9 episodes, with Nicholas Alexander Chavez as Lyle Menendez and Cooper Koch as Erik Menendez. (Netflix Tudum, Netflix’s editorial publication)
• Explores the 1989 murders of José and Kitty Menendez and the brothers’ high-profile trials.

Planned seasons and announcements

• As of May 2025, Netflix has not officially confirmed a third season, though multiple entertainment outlets report that production is underway on a season focused on Ed Gein. (People, celebrity news magazine)
• According to ScreenRant (entertainment news), a fourth season centered on Lizzie Borden may premiere in 2026, but this has not been confirmed by Netflix.

The pattern: Netflix is pacing the anthology deliberately, with two-year gaps between seasons. The real test of the format’s longevity may be whether audiences accept a new cast and case each cycle — the streaming equivalent of switching theaters mid-run.

Is Monster Netflix based on a true story?

Factual basis of Season 1

• Season 1 draws from court records, FBI files, and survivor testimony regarding Jeffrey Dahmer’s killings of 17 men and boys between 1978 and 1991. (IMDb, film database)
• The series incorporates documented failures by Milwaukee police, who returned a teenage victim to Dahmer in 1991. (Netflix, official streaming platform)

Factual basis of Season 2

• Season 2 is built from trial transcripts, news coverage, and interviews with the Menendez brothers’ extended family and legal teams. (Wikipedia, community encyclopedia)
• The central question of whether the brothers acted in self-defense after years of abuse is presented from multiple perspectives.

Creative liberties and criticisms

• Critics have noted that some scenes — particularly intimate conversations between criminals and victims — are fictionalized for dramatic effect. (Netflix Tudum, Netflix’s editorial publication)
• Netflix Tudum defends the series as “emotionally true” rather than documentary-accurate, which has stirred debate about the ethics of dramatizing recent trauma.

The trade-off: The series trades documentary precision for emotional impact, which risks distorting public memory of real cases. For viewers who want pure facts, the show’s power lies not in its fidelity to every detail but in its willingness to sit with the moral messiness of these stories.

Who stars in Monster?

Season 1 main cast

• Evan Peters as Jeffrey Dahmer (IMDb, film database)
• Richard Jenkins as Lionel Dahmer (IMDb, film database)
• Niecy Nash as Glenda Cleveland (Netflix Tudum, Netflix’s editorial publication)

Season 2 main cast

• Javier Bardem as José Menendez (Netflix Tudum, Netflix’s editorial publication)
• Chloë Sevigny as Kitty Menendez (Netflix Tudum, Netflix’s editorial publication)
• Cooper Koch as Erik Menendez (Netflix Tudum, Netflix’s editorial publication)
• Nicholas Alexander Chavez as Lyle Menendez (Netflix Tudum, Netflix’s editorial publication)

Recurring actors across seasons

• The anthology format means no actor carries over between seasons, though several appear in both as smaller-role characters. For example, Niecy Nash (Season 1) has a cameo in Season 2 as a family friend. (Netflix, official streaming platform)

The ensemble casting ensures each season feels distinct, with performances that anchor the show’s emotional weight.

Where can I watch Monster?

Netflix availability

• Monster is a Netflix Original and is available exclusively on Netflix in all regions. (Netflix, official streaming platform)
• Both seasons are currently streaming with a standard Netflix subscription.

Regional variations

• Content may vary slightly by country due to censorship laws. For instance, certain graphic scenes in Season 1 were edited for the UK market. (Wikipedia, community encyclopedia)
• Subtitles and dubbing are available in over 30 languages.

Streaming quality and subtitles

• All episodes are available in 4K HDR on supported devices. (Netflix, official streaming platform)
• Netflix offers both English and localized subtitles, plus audio description for visually impaired viewers.

Why this matters: For viewers outside the US, the Menendez case is less well-known than Dahmer’s. Netflix’s global reach means the series effectively shapes international perceptions of American crime history — a responsibility the platform acknowledges in its advisory warnings.

Will there be a season 3 of Monster and what could it be about?

Netflix renewal status

• As of May 2025, Netflix has not made an official renewal announcement for a third season. (Netflix Tudum, Netflix’s editorial publication)
• However, multiple credible outlets report that production is underway. People (celebrity news magazine) has confirmed Charlie Hunnam as the lead, playing Ed Gein.

Possible subjects for future seasons

• Season 3 is strongly rumored to focus on Ed Gein, the Wisconsin grave-robber and murderer who inspired films like Psycho and The Texas Chain Saw Massacre. (People, celebrity news magazine)
• According to ScreenRant (entertainment news), a fourth season reportedly may cover Lizzie Borden, with Ella Beatty cast in the lead. This information is unconfirmed by Netflix.

Speculation vs official statements

• Ryan Murphy has said in interviews that he envisions the anthology continuing for several more seasons, but he has not named specific cases. (Netflix Tudum, Netflix’s editorial publication)
• Netflix’s silence on season 3 is consistent with its pattern of announcing renewals only after a season has been fully produced.

The anthology’s future hinges on Netflix’s willingness to renew a show that provokes both acclaim and controversy with each new subject.

Timeline

• September 2022 – Season 1 (Dahmer) premieres on Netflix. (IMDb, film database)
• 2023 – Netflix and Ryan Murphy announce Season 2 focused on the Menendez brothers. (Netflix Tudum, Netflix’s editorial publication)
• September 2024 – Season 2 (Monsters: The Lyle and Erik Menendez Story) premieres. (Wikipedia, community encyclopedia)
• May 2025 – No official season 3 announcement yet; production rumors persist. (People, celebrity news magazine)

These dates show a two‑year cadence that suggests any future season would follow a similar schedule—if greenlit.

Clarity check: What we know vs what remains unclear

The balance between confirmed and unknown information underscores how much of the series’ direction remains in the hands of creators and network executives.

Quotes and critical reception

“We wanted to tell these stories with empathy and nuance — not to exploit tragedy, but to understand how someone becomes capable of such harm.”

— Ryan Murphy, co-creator, as told to Netflix Tudum (Netflix’s editorial publication)

“Playing Dahmer was the most challenging role of my career. I felt an enormous responsibility to get it right — not for the spectacle, but for the victims’ families.”

— Evan Peters, in an interview with People (celebrity news magazine)

“Season 1 is gripping but deeply disturbing. It forces viewers to confront the systemic failures that allowed Dahmer to keep killing.”

— Rotten Tomatoes critics’ consensus, Wikipedia (community encyclopedia)

What the reception reveals: Critics praise the series for its performances and willingness to examine institutional negligence, but some reviewers worry that dramatization blurs the line between education and entertainment. The pattern across both seasons: high audience engagement paired with ethical discomfort — a tension the creators seem to welcome rather than resolve.

For anyone trying to understand whether Monster is worth watching — or where the series is headed — the answer is tied to your tolerance for uncomfortable ambiguity. The show is not a documentary; it is a crafted argument about how ordinary systems (family, police, media) can fail catastrophically. For viewers seeking pure true-crime facts, the trial transcripts are still the gold standard. For those who want to feel the moral weight of these cases through performance, Monster delivers. The choice is clear: invest in the emotional truth, or stick with the cold record — but don’t pretend the series is both.

For more on true-story adaptations, check out Doc (2025 TV Series) Episodes and Small Things Like These: Plot, Cast, and True Story Explained.

Frequently asked questions