Using various settings such as haunted houses, vampires and all kinds of supernatural themes, this series of half-hour episodes showed several stories that were the stuff of nightmares to many people during those years. Many know Mexican directors such as Guillermo del Toro and Alfonso Cuarón contributed in the making of some of these episodes when they weren't as famous as they are now.
One constant theme in the series was the presence of a black-clad woman simply known as the Woman in Black, who, supposedly, was the incarnation of Death.
Tropes in Hora marcada:
- Asshole Victim: Some of them were this.
- Be Careful What You Wish For: Somewhat averted in "Not All That Glitters...". You will get exactly what you want and the wish won't be twisted in any way. But the more more wishes you make, the more your right hand will be deformed.
- Deal with the Devil
- Downer Ending: A good chunk of the episodes have this kind of ending.
- Earth-Shattering Kaboom: What happened to the world in "Doctor Elias and Death". After having Death locked away, nothing could die anymore (humans, animals, plants and even micro-organisms) and the planet couldn't withstand the existence of so much immortal beings.
- Human Resources: In "With Everything to Go"/"Hamburgers" the secret behind the Roonie's burger joint's graveyard shift was that the "employees" were actually re-animated zombies, saving the company lots of money in paychecks, social security, insurances, etc. They looked like regular people at the start, but as their bodies decayed and decomposed, they were dressed in the mascot suits to hide away the rot. And once they couldn't be useful anymore, they were processed as patty meat.
- I Am A Humanitarian: A couple of episodes ("The Sect" and "Les Gourmets") revolved around people indulging in cannibalism.
- Pac-Man Fever: "Videogames". There was no button mashing, but they didn't even bother with placing 8-bit graphics and just featured the game live-action style (with deliberate lower quality to imitate 8-bit graphics). To be fair, this episode was made around 1990, so the The 16 bit Era of Console Video Games hasn't even started just yet.
- Spiritual Successor: Had one in 13 Miedos ("13 Fears", also stylized as M13dos), which itself focused on 13 episodes based on certain fears that plague humanity (fear of death, fear of past mistakes, fear of justice, ect ect).
- The Most Dangerous Videogame: The plot point of the episode "Videogames".
- Too Dumb to Live: Some victims can be considered guilty of this.