How many seasons does Killing Grounds: The Gilgo Beach Murders have?

Killing Grounds: The Gilgo Beach Murders has 1 season with 4 episodes.

What network is Killing Grounds: The Gilgo Beach Murders on?

Killing Grounds: The Gilgo Beach Murders airs on Prime Video.

When did Killing Grounds: The Gilgo Beach Murders premiere?

Killing Grounds: The Gilgo Beach Murders premiered on April 22, 2026.

Killing Grounds: The Gilgo Beach Murders

Name: Killing Grounds: The Gilgo Beach Murders
Genre: Crime

Prime Video Ended Crime

1 Season · 4 Episodes · Premiered April 22, 2026 · Ended April 22, 2026

When a woman vanishes, police find bodies along Long Island's shore. Years of dead ends and overlooked victims stall the case until a new task force spots a suspect hiding in plain sight. With trial looming, insiders and families speak.

Where to Watch: Prime Video

Official Site

Next Air Time: No upcoming air date

Seasons & Episodes

Season 1

4 episodes

E01

Part One

Wed, Apr 22 2026 12:00 PM GMT+0000 47 min

While searching for a missing woman on Long Island, police uncover a hidden burial ground. As families demand answers, investigators begin to realize a serial killer may have been operating unnoticed for years.

E02

Part Two

Wed, Apr 22 2026 12:00 PM GMT+0000 38 min

After years of stalled leads and system failures, a new task force reopens the Gilgo case, unearthing phone records, witness accounts, and vehicle clues that all point to a suspect who's been hiding in plain sight.

E03

Part Three

Wed, Apr 22 2026 12:00 PM GMT+0000 42 min

A year of surveillance and clandestine DNA sampling leads to Rex Heuermann's arrest. As investigators dig deeper, other victims are connected as terrifying new evidence is revealed.

E04

Part Four

Wed, Apr 22 2026 12:00 PM GMT+0000 45 min

A disturbing document recovered from Rex Heuermann's computer reveals what looks like a detailed murder plan. Investigators add victims and trace links far beyond Long Island. Ahead of the trial, a court ruling reveals the path forward for the case.