Serial

Serial Productions / The New York Times Company · 4 seasons · 420M+ total downloads · First podcast to win a Peabody Award

Overview

Serial is an independent, non-profit news journal in audio form. It is an investigative journalism podcast that narrates a single true story over the course of a season, with each season devoted to a different subject. Co-created and co-produced by Sarah Koenig and Julie Snyder as a spinoff of This American Life, it launched on October 3, 2014, and has been downloaded more than 420 million times across its four seasons — making it, by that measure, the most listened-to podcast in the history of the form. It was the first podcast to win a Peabody Award. Its first season, which investigated the 1999 conviction of Adnan Syed for the murder of Hae Min Lee in Baltimore, is credited with triggering the mainstream growth of the podcast medium and the true-crime audio genre that followed. Serial Productions, the company Koenig and Snyder formed in 2015 to manage the show and subsequent projects, was acquired by The New York Times Company in 2020.

History and Format

Serial was developed within This American Life with support from the program's founder, Ira Glass, and produced in association with WBEZ Chicago. Koenig had been a producer at This American Life since 2004 and came to the Serial story in 2013 after attorney Rabia Chaudry contacted her with the claim that her friend Adnan Syed had been wrongly convicted. Koenig spent nine months reporting — reviewing trial transcripts, interviewing witnesses, scrutinizing cell tower data — before the first episode aired. Early recording sessions took place in her basement, at a time when podcast listenership was modest and expectations were low. MailChimp, an email marketing company, was the series' original sponsor.

The first episode dropped on October 3, 2014. By episode five the show had reached 5 million downloads — more than any podcast had achieved at that pace. By the end of Season 1 it had become the most downloaded podcast in history to that point. The cultural response was substantial: a Saturday Night Live parody aired in December 2014; comedians, critics, and legal scholars debated its methods and ethics; Reddit communities formed to crowdsource investigation of the case. The series demonstrated, in Ira Glass's assessment, that "something could be that big," catching both the creative community and the media business community's attention and accelerating investment in podcasting industry-wide.

In 2015, Koenig and Snyder formed Serial Productions as an independent entity. In 2017 the company produced S-Town, co-created with Brian Reed, which reached 100 million downloads. Subsequent Serial Productions titles include Nice White Parents, The Trojan Horse Affair (with The New York Times), The Retrievals, and The Coldest Case in Laramie. In July 2020, Serial Productions was acquired by The New York Times Company. Full access to Serial seasons and other Serial Productions titles is now available through the NYT's podcast subscription service, though free access remains available on major platforms.

Affiliate Stations and Distribution

Serial is podcast-native and not distributed as a syndicated broadcast program. Its original production involved WBEZ Chicago and This American Life; since the formation of Serial Productions and the NYT acquisition, it is produced and distributed independently of any broadcast station network. It is available on all major podcast platforms and through the NYT podcast subscription.

WBEZ 91.5 FM

Chicago, Illinois — origin station; early production partnership with This American Life

Apple Podcasts

Primary distribution; available free on all major platforms

Spotify

Available globally on Spotify free and premium tiers

NYT Podcast Subscription

Full access (including Serial Productions titles) via nytimes.com/podcasts

serialpodcast.org

Official site with episode archive and show information

Audience and Demographics

Serial Season 1 became the most downloaded podcast in history at the time of its release, reaching 5 million downloads within weeks of its debut. Total downloads across all four seasons exceed 420 million as of 2025. The show's audience is drawn from across the general public — its Season 1 subject matter (true crime, wrongful conviction, the American criminal justice system) attracted listeners well beyond the public radio base that had been This American Life's core. The show's demographic profile — documented as educated, urban, and engaged — broadly reflects the podcast-listening population of the mid-2010s, which skewed younger and more digitally active than the broadcast radio audience. Internationally, the show achieved significant listenership in the United Kingdom, Australia, Canada, and other English-speaking markets. Time magazine named Serial among its 100 Best Podcasts of All Time in 2025.

Main Sponsors

Sponsorship has varied by season and has shifted from direct-response podcast advertising toward the NYT subscription model since the 2020 acquisition.

MailChimp (Season 1, original sponsor)SquarespaceAudibleThe New York Times (distribution partner / owner)NYT podcast subscription (current access model)

MailChimp's sponsorship of Season 1 became itself a cultural artifact — its mispronunciation as "MailKimp" in early episode credits generated widespread attention and is cited in advertising industry lore as a case study in the effectiveness of podcast sponsorship at scale.

Seasons

Season 1 · 2014 · 12 episodes

The Case of Adnan Syed

Re-investigation of the 1999 murder conviction of Adnan Syed for the killing of Hae Min Lee in Baltimore County, Maryland. Triggered by attorney Rabia Chaudry's 2013 approach to Koenig. Raised evidentiary doubts including flawed cell tower data and an uncorroborated alibi. The most downloaded podcast in history at time of release; first podcast to win a Peabody Award. Syed's conviction was vacated in 2022 and he was released; charges were dropped in 2023. Adapted into HBO's The Case Against Adnan Syed (2023).

Season 2 · 2015–16 · 11 episodes

Bowe Bergdahl

Investigation of U.S. Army Sergeant Bowe Bergdahl, who walked off his post in Afghanistan in 2009 and was held by the Taliban for five years before being exchanged for five Guantánamo detainees. Bergdahl was court-martialed in 2017. Season 2 explored the circumstances of his disappearance, the search missions that followed, and the political controversy surrounding his exchange.

Season 3 · 2018 · 9 episodes

A Year in the Life of Cleveland's Justice System

Embedded reporting from the courts of Cuyahoga County, Ohio, over the course of a year. Departed from the single-case format of Seasons 1 and 2 to examine the broader institutional workings of a county criminal justice system — judges, prosecutors, public defenders, defendants, and the pressures that shape outcomes. Won a Peabody Award.

Season 4 · 2022 · 10 episodes

Guantánamo

Examination of the U.S. detention facility at Guantánamo Bay, Cuba — its history, its legal framework, the cases of men held there, and the political and institutional forces that have kept it open. Co-hosted by Sarah Koenig and Dana Chivvis. First season produced under The New York Times Company ownership.

Recognition

2015

Peabody Award — Season 1

First podcast in history to win a Peabody Award. Citation: "an audio game-changer."

2019

Peabody Award — Season 3

For the embedded reporting from Cuyahoga County's criminal courts.

2025

Time magazine — 100 Best Podcasts of All Time

Serial listed alongside S-Town, The Retrievals, and Nice White Parents — all Serial Productions titles — on Time's 2025 list.

Multiple years

duPont-Columbia Award · Overseas Press Club Award · Third Coast International Audio Festival awards

Among the most decorated podcasts in the major audio journalism award categories.

Serial

Production: Serial Productions · owned by The New York Times Company (since July 2020)

Origin: Spinoff of This American Life / WBEZ Chicago · developed with Ira Glass

Host: Sarah Koenig · Co-creator / Co-producer: Julie Snyder

Seasons: 4 · Episodes: 42 · Total downloads: 420M+

Website: serialpodcast.org

Native podcast: Apple Podcasts · Spotify · nytimes.com/podcasts (full access)

Contact: serialshows@nytimes.com