How many seasons of Cuarto Milenio are there?

Cuarto Milenio has aired 21 seasons so far.

How many episodes of Cuarto Milenio are there?

There are 872 episodes of Cuarto Milenio across 21 seasons.

Who created Cuarto Milenio?

Cuarto Milenio was created by Iker Jiménez.

Reality

When Does Cuarto Milenio Season 22 Come Out? Is It Renewed?

Cuarto Milenio Season 22 doesn't have an official release date yet. Based on the roughly 12-month gap between previous seasons, expect it around September 2026.

TMDB

7.6

Seasons

Episodes

872

Diagnostics

Network: Cuatro
Genres: Reality, Mystery
First aired: 2005-11-13
Last aired: 2026-03-22
Runtime: 120 min

Predictive Logic Analysis

Cuarto Milenio represents a rare longevity success in European television: a mystery/reality anthology series that has aired continuously since 2005, spanning 21 seasons and 872 episodes. This production volume and lifespan signal both network confidence and a sustainable format — the anthology structure allows flexible scheduling and content sourcing, reducing production risk compared to serialized dramas. The fact that the series aired as recently as March 2026 (per the metadata) indicates active production and ongoing slot importance for Cuatro, Spain's fourth major network.

Broadcast networks typically maintain anthology series longer than narrative dramas because replacement costs are lower and audience expectations simpler. With no credible cancellation announcement in the renewal signals block, and TMDB flagging the show as "Returning Series," the baseline assumption is continuation — barring unexpected network restructuring or advertiser exodus. However, the complete absence of recent renewal coverage in major trade publications or fan outlets introduces meaningful uncertainty; it is possible the show's renewal status simply goes unannounced or is decided only seasonally in the Spanish market, where English-language trade coverage is sparse.

What is Cuarto Milenio about?

Cuarto Milenio stands as Spain's longest-running paranormal and mystery documentary series, a cultural institution that has captivated audiences for over two decades by venturing into the shadows of the unexplained. Hosted by Iker Jiménez and Carmen Porter, the program invites viewers into a world where folklore, UFO sightings, cryptids, historical enigmas, and supernatural phenomena are treated with the seriousness of genuine investigation. The show's fundamental appeal lies in its willingness to ask the questions mainstream media ignores, presenting witnesses, experts, and evidence while leaving room for viewers to draw their own conclusions about mysteries that defy easy explanation.

The series distinguishes itself through a measured, investigative approach that avoids sensationalism while maintaining genuine intrigue. Rather than relying solely on theatrical reenactments or manufactured scares, Cuarto Milenio grounds its episodes in documented cases, archival research, and direct testimony, creating an atmosphere of credible curiosity. The show's aesthetic—combining stark production design, ambient sound design, and deliberate pacing—cultivates an almost contemplative tone unusual for the paranormal genre. This restraint, combined with Jiménez's authoritative but accessible narration, has allowed the program to appeal beyond typical genre enthusiasts to viewers simply drawn to mystery and historical oddities.

The show's longevity and sustained viewership across 21 seasons and nearly 900 episodes testify to its resonance within Spanish popular culture. Cuarto Milenio has become something of a national conversation starter, with episodes frequently sparking debate on social media and generating broader cultural discussion about belief, evidence, and the unknown. In a television landscape dominated by reality television spectacle, the program's commitment to depth and its respect for its audience's intelligence have fostered genuine loyalty, making it one of Spanish television's most consistent performers.

Within the paranormal documentary genre, Cuarto Milenio occupies a unique position—neither as strictly academic as some international programs nor as entertainment-driven as others, but instead a distinctly Spanish synthesis that balances rigor with wonder. Its cultural footprint extends beyond television into books, podcasts, and live events, cementing Jiménez's role as a central figure in Spanish popular curiosity about the unexplained. The series demonstrates that there remains a substantial, enduring audience for intelligent exploration of mystery.

Created by Iker Jiménez

Is Cuarto Milenio renewed or cancelled?

Working toward renewal

high

TMDB 'Returning Series' status and continuous airing through March 2026

high

21 seasons and 872 episodes: proven format longevity and network confidence

medium

Anthology format: lower production risk and replacement cost than serialized drama

medium

No credible cancellation signal in renewal-focused coverage

Working against it

medium

Absence of explicit recent renewal announcement in trade publications

Cuarto Milenio Season 22 Release Date

Given that Cuarto Milenio last aired in March 2026 and exhibits a regular production cadence over two decades, a new season would likely air in late 2026 or early 2027, following the typical annual or biennial rhythm for Spanish broadcast anthology series. However, without explicit production or greenlight announcements, the exact timing is speculative. Spanish networks often announce renewals closer to air dates than U.S. or UK streamers, so a formal renewal announcement may not arrive until autumn 2026.

S21