Cuarto Milenio

2005– · Mystery, Reality · 22 seasons · ★ 7.6

Returning series

+12

Synopsis of Cuarto Milenio

Cuarto Milenio is a mystery and investigation television program that airs weekly on Cuatro. It is hosted and presented by journalists Iker Jiménez and Carmen Porter, who bring to the screen subjects related to the unknown. Topics range from conspiracy and the occult to criminology, astronomy, ufology, archaeology, history, zoology and physics. To cover them, the team often brings in scientists and experts from fields such as psychiatry, anthropology, history and criminology. The show blends mystery with popular science, so guests can present their point of view on each subject from their specialty, without being limited to supernatural phenomena.

22seasons

894episodes

120 minper episode

7.6audience scoreTMDB · 51 votes

7.8IMDb rating182 votes

Next episode

22x10 · Episodio 10

November 15, 2026

Cast by Cuarto Milenio

Iker JiménezPresentador896 episodes

Carmen PorterPresentadora896 episodes

Technical Details

Created by: Iker Jiménez
Production companies: Mediaset España, Alma Producciones Digitales
Network or Platform: Cuatro
Country: Spain
Original Language: Spanish
Premiere: November 13, 2005
Latest episode aired: November 8, 2026 (22x09)
Status: Returning series
Type: Fiction
Awards: 1 awards in total.
Links: IMDb · TMDB · Official Website

Trivia about Cuarto Milenio

The program led to the creation of two spin-offs. One is La mesa del coronel, a geopolitics show presented by Colonel Pedro Baños Bajo, and the other is Horizonte.

In 2010, the program received the silver medal for Best International Opening Title Sequence at the New York International Television & Film Festival.

The alleged cosmonaut Ivan Stochnikov, covered in June 2006, was in fact a 1997 hoax created by photographer Joan Fontcuberta.

In 2019, Iker Jiménez acknowledged three or four mistakes in two thousand hours of television, and stated that they have been right in 99% of cases.

Its viewership has hovered around 6–7% in recent years, which has made it a television phenomenon thanks to its long run.

"Cuarto Milenio" premiered its twenty-second season on September 13, 2026, with a report recorded by Iker Jiménez and Carmen Porter in the demilitarized zone between North Korea and South Korea.

Season 22 added four new segments: "Cryptozoology," "Better Not Know," "Exorcisms" and "Archaeology and AI," hosted by Álex Lachtein, Enrique de Vicente, José Miguel Gaona and Javier Sierra.

Cuatro temporarily pulled "Cuarto Milenio" from its schedule in June 2026 to air a special of "Horizonte" dedicated to the 80th birthday of Donald Trump.

Sources: Wikipedia (Spanish)