TV-Series
Description
Inspector Heinrich Lunge is a senior detective with the Bundeskriminalamt, the German federal criminal police, and is widely regarded as one of their most perceptive and effective officers. He enters the story assigned to the murder case at Eisler Memorial Hospital, where several doctors were killed.

Lunge is a man who appears almost entirely devoid of emotion. He operates on a plane of pure logic and detached analysis, viewing his work not as a pursuit of justice or fame, but as an intricate intellectual puzzle to be solved. He is famously methodical and persistent, taking great pride in a personal record of having solved every case he ever undertook. This single-minded dedication, however, comes at a tremendous cost. His obsession with his work systematically dismantles his personal life; he remains completely oblivious to his wife's infidelity and is unaware that his daughter is pregnant until the moment his family leaves him. He prioritizes his investigations above all else, even missing the chance to meet his newborn grandson in order to pursue a lead related to Dr. Kenzo Tenma.

His primary role in the story is that of an antagonist and relentless pursuer of Dr. Kenzo Tenma, whom he believes to be the serial killer responsible for a string of murders. Initially, Lunge dismisses Tenma's claims about a boy named Johan Liebert, believing the doctor invented this figure as an excuse. This theory later evolves, and Lunge comes to suspect that Tenma suffers from dissociative identity disorder, with the affable surgeon and the vicious killer Johan being two personalities of the same man. This conviction fuels a years-long cat-and-mouse game, with Lunge acting as the formidable, unyielding detective hell-bent on proving his theory. His investigative techniques are unorthodox and highly effective. He possesses a prodigious memory, which he accesses through a unique physical tic, mimicking the gestures of typing on a keyboard as if inputting and saving data into his mind. Furthermore, he is able to place himself inside the mind of a perpetrator, a method where he repeats "I am the killer" to understand their motives and predict their next moves. This technique utterly fails when he attempts it on Johan, as he cannot reconcile the concept of a killer with no discernible motive or sense of self, forcing him to conclude, "I do not exist".

Throughout his pursuit, Lunge has key relationships that define his path. His rivalry with Tenma is the central axis of his journey, evolving from cold pursuit to a final, crucial understanding. He also works alongside and conflicts with other BKA officers, including his colleague, Inspector Werner Weber, who offers a more empathetic approach. The forensic psychologist Rudy Gillen serves as an intellectual foil, questioning the potential biases in Lunge's data-storing methods.

Lunge's character undergoes a significant development over the course of the story. His unshakeable certainty is his greatest strength and his most profound flaw. The first crack in his armor appears when he pushes a suspect too hard, leading to the suspect's suicide and causing Lunge to be removed from his cases. This professional humiliation, coinciding with the collapse of his family, leaves him with nothing but the pursuit of Tenma. However, the true turning point occurs when evidence forces him to accept that Johan Liebert is a real, independent person and that his long-held theory about Tenma has been completely wrong. In the town of Ruhenheim, during the story's final confrontation, Lunge meets Tenma and offers a sincere apology for his years of mistaken accusations. He then engages in a brutal gunfight with the assassin Roberto. After surviving the encounter, Lunge ensures that Roberto is blamed for the massacre, an act that is implied to be an effort to protect Tenma from further prosecution. In the aftermath, having finally solved the puzzle to his own satisfaction, Lunge retires from field work and becomes a professor at a police academy. He is last seen reconnecting with his daughter and grandson, and visiting the grave of the journalist Wolfgang Grimmer, a man he came to respect, leaving a beer as an offering.