As of July 2026, Monster Season 1 aired in 2004 with 74 episodes — streaming now on Netflix. Full episode guide and where to watch below.
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Monster Season 1

2004 74 Episodes Animation · Drama ⭐ 9/10

Right now you can watch Monster Season 1 on and — and it earns its twists rather than manufacturing them. A single, tightly-focused season means there is plenty to get through without ever feeling padded. Its 9/10 TMDB score, built from 795 ratings, reflects a title that consistently delivers. Hidenobu Kiuchi leads a cast that carries the story without ever feeling mechanical. Available now — press play and find out why people keep recommending it.

Part of the current wave of titles people are actually watching, Monster Season 1 earns its spot. Monster Season 1 treats its mystery as a means, not an end in itself. Season 1 of Monster includes 74 episodes. It aired from April 2004 to September 2005. This season stars Hidenobu Kiuchi, Nozomu Sasaki and Mamiko Noto. Hidenobu Kiuchi and Nozomu Sasaki lead a cast that brings real weight to the material. It was aired in 2004. What makes Monster Season 1 hold up is that the resolution matters less than how the characters get there. This is the rare one where the reputation undersells the reality.

For anyone who wants their crime drama to earn its twists, Monster Season 1 delivers. If you have run out of similar titles to watch, this is a strong next pick. Best experienced as a single, sustained watch if your schedule allows. Hidenobu Kiuchi carries scenes that would sink a lesser production. The resolution feels inevitable rather than arbitrary, which is rarer than it sounds.

📡 Where to Watch Monster Season 1

🇦🇺 Australia
🇺🇸 United States
🇬🇧 United Kingdom
🇨🇦 Canada
🇳🇿 New Zealand
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🎬 Monster Season 1 — Episode Guide

E1
Herr Dr. Tenma
2004-04-07
Dr. Kenzo Tenma, a leading neurosurgeon at the Dusseldorf Hospital has received massive acclaim for his successful surgery on a famous opera singer. However, he is burdened by guilt. Due to pressure from the director, he had operated on the opera singer on the night that he was supposed to operate o...
E2
Downfall
2004-04-14
The price for disobeying Dr. Heinemann's orders to operate on the mayor is costly for Dr. Tenma. His career begins to plummet. The boy whom he saved finally awakens, but a horrible incident occurs soon after.
E3
A Murder
2004-04-21
Things look brighter for Dr. Tenma, now that Dr. Heinemann is dead. His career takes off, and even Eva tries to win him back. But unfortunately, all that success has drawn the attention of Detective Lunge.
E4
Night of the Execution
2004-04-28
Adolf Junkers has information about the serial murders that is vital to the police, but he is afraid to reveal them. Dr. Tenma's care for Adolf Junkers however wins him over. His close relationship with Junkers however leads him to a night of shocking horror.
E5
The Girl of Heidelberg
2004-05-05
Nina Fortner, a talented young student in Heidelberg has been having nightmares. She also cannot remember anything about her life before she was 10 years old. She soon suffers from fainting spells in university and starts receiving anonymous emails.
E6
The Missing
2004-05-12
Nina finally receives an email informing her to meet the anonymous sender at a specified time and place. Dr. Tenma in his search for the Liebert girl, asks Mauler, an editor for a local publisher, for assistance in his investigations.
E7
House of Tragedy
2004-05-19
Tenma and Nina return to the Fortners’ residence to find Mauler and Nina’s parents dead. Two detectives arrive to take them to the station for questioning, but certain things don't look right.
E8
Pursued
2004-05-26
Eva tries to threaten Dr. Tenma, unless he gets back with her, she would reveal to the police that the tie that was found at the scene of the crime is his!
E9
The Girl and the Seasoned Soldier
2004-06-02
An old mercenary soldier named Hugo is interrogated by Lunge about a student of his, a doctor named Tenma.
E10
A Past Erased
2004-06-09
Tenma encounters a burglar named Heckel who claims to have seen the killer. It soon results in Heckel leading Tenma to a couple of murderers.
E11
511 Kinderheim
2004-06-16
Tenma learns that Johan used to be in an orphanage known as Kinderheim 511. And he meets a former East German official named Hartmann who used to work there and an injured boy named Dieter.
E12
A Little Experiment
2004-06-23
Dieter is picked up by Hartmann before Tenma could return. And Tenma learns more about the experiments in Kinderheim 511.
E13
Petra and Schumann
2004-06-30
In a small village, Dr. Schumann worries over the health of his sick but stubborn old friend, Petra.
E14
Left Behind
2004-07-07
Inspector Lunge investigates the murder of a prostitute and suspects a senator named Dr. Boltzmann of involvement. His dedication to his work however takes a toll on his family life. Meanwhile, the vindictive Eva continues to press Lunge to catch Tenma. She also has a new lover, her gardener.
E15
Be My Baby
2004-07-14
Dr. Tenma and Nina Fortner's investigations lead them to a powerful man known as 'The Baby', who belongs in an extremist organisation. They soon learn that the organisation has special plans for the Turkish district tomorrow.
E16
Wolf's Confession
2004-07-21
Nina escapes the mansion. And Tenma meets with the unrecognizable General Wolf at the mansion later.
E17
Reunion
2004-07-28
The extremists plans are put into action, and Tenma decides to postpone his search for Johan and instead heads to the Turkish district to warn the people there. Dieter and Heckel are captured by the skinheads and are left to burn in the fire. And Nina tries to get information about the 'main dish' f...
E18
Five Sugars
2004-08-04
Nina meets with an old friend and boss, Mister Rosso. The delightful old boss however, has a very dark past.
E19
Monster's Abyss
2004-08-11
Tenma visits Rudy, a criminal psychologist, who is working on cases involving a murderer named Jurgens.
E20
Journey to Freiham
2004-08-18
Tenma and Dieter hitch a ride with an elderly couple on the way to Freiham. Tenma wonders if the couple plan to turn him in.

🎭 Cast of Monster Season 1

Hidenobu Kiuchi
Hidenobu Kiuchi
Tenma (voice)
Nozomu Sasaki
Nozomu Sasaki
Johan Liebert (voice)
Mamiko Noto
Mamiko Noto
Nina Verdona (voice)
Tsutomu Isobe
Tsutomu Isobe
Lunk (voice)

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