Monster: The Crimson King

Monster: The Crimson King
File:Monster The Crimson King 2034.jpg Promotional release poster
Showrunner	Jane Holloway
Starring	Cillian Murphy Octavia Spencer Jeremy Allen White Anya Taylor-Joy Willem Dafoe Pedro Pascal Keke Palmer
No. of episodes	10
Release
Original network	HBO
Season chronology

Monster: The Crimson King is the upcoming fifth season of the American biographical crime drama anthology series Monster. Created for HBO, the season departs from previous entries by centering on a fictional killer rather than dramatizing a real historical case. Cillian Murphy stars as the Crimson King, a predator who evades capture across multiple states for nearly two decades. The season will premiere in October 2034 on HBO and Max.

Synopsis

Set between the late 1980s and early 2000s, the season chronicles the rise and reign of the Crimson King, a fictional composite serial killer who thrives on systemic oversight, media obsession, and cultural fear. His crimes span decades and jurisdictions, exposing law enforcement rivalries and bureaucratic neglect.

Unlike past seasons confined to a single city or case, The Crimson King will follow investigators, survivors, and community voices across multiple eras, dramatizing how one figure created a shadow that lasted nearly twenty years.

Cast and characters

• Cillian Murphy as the Crimson King, a fictional serial predator whose longevity and elusiveness make him “five times worse than Dahmer.”
• Octavia Spencer as Detective Marianne Cole, the lead investigator who dedicates her life to pursuing the killer.
• Jeremy Allen White as Mark Rivers, a journalist whose obsession with the Crimson King borders on self-destruction.
• Anya Taylor-Joy as Clara Benton, one of the few survivors whose testimony becomes pivotal.
• Willem Dafoe as Chief Raymond Holt, a police veteran whose negligence in the 1980s allowed the case to spiral.
• Pedro Pascal as Senator Daniel Voss, a politician who exploits fear for political power in the 1990s.
• Keke Palmer as Naomi Green, an activist demanding justice for ignored victims.

Guest stars will include portrayals of victims’ families, local law enforcement, and community leaders drawn into the decades-long manhunt.

Episodes

No. overall	No. in season	Title	Directed by	Written by	Original air date
28	1	TBA	TBA	TBA	TBA
29	2	TBA	TBA	TBA	TBA
30	3	TBA	TBA	TBA	TBA
31	4	TBA	TBA	TBA	TBA
32	5	TBA	TBA	TBA	TBA
33	6	TBA	TBA	TBA	TBA
34	7	TBA	TBA	TBA	TBA
35	8	TBA	TBA	TBA	TBA
36	9	TBA	TBA	TBA	TBA
37	10	TBA	TBA	TBA	TBA

Production

Development

On March 10, 2033, HBO announced that Season 5 would be titled The Crimson King, its first fictionalized entry. The move followed the cancellation of earlier concepts Monster: The Zodiac Killer and Monster: The Hollywood Ripper. Showrunner Jane Holloway explained the pivot as a way to avoid retraumatizing real families while still exploring themes of systemic oversight and cultural paranoia.

In September 2033, Cillian Murphy was confirmed to star as the Crimson King, with Octavia Spencer, Jeremy Allen White, Anya Taylor-Joy, Willem Dafoe, Pedro Pascal, and Keke Palmer also announced in leading roles.

Filming

Filming is scheduled to begin in early 2034, with production spanning multiple U.S. locations to reflect the multi-state scope of the narrative.

Release

Monster: The Crimson King is scheduled to premiere in October 2034 on HBO and Max, with episodes airing weekly until December.