The series 'Memory of a Killer' centers around Angelo Doyle, played by Patrick Dempsey, who is a successful hitman facing the onset of dementia. Despite his glamorous lifestyle, complete with a stylish apartment and a luxury car, Angelo's memory lapses begin to pose significant challenges in his life. An alarming discovery of his gun stored in the refrigerator – a reflection of his forgetfulness – serves as a harbinger of the potential dangers that lie ahead, not only for him but for those around him.

Angelo’s forgetfulness has yet to interfere with his work as a killer, but it raises pressing questions about the security of his double life. He manages to remember to carry out a job involving an Asian gangster, thereby maintaining his professional demeanor even while grappling with personal struggles. As the story unfolds, viewers will likely ponder how long he can continue this precarious balance between his profession and the deteriorating state of his mind.

The implications of Angelo's dementia are significant as the series explores themes of memory, identity, and the increasing fragility of life when one’s mental faculties begin to wane. The juxtaposition of a killer's merciless world with the vulnerabilities of human cognition creates a compelling narrative that invites the audience to reflect on the complexities of life and memory itself.