Killing Grounds: The Gilgo Beach Murders

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About

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.

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Miniseries2026

7.47142h 51m

	Ep	Title	Rating	Votes	Runtime
▶	1	Part One	7.2	20	47 min
▶	2	Part Two	7.4	18	38 min
▶	3	Part Three	7.3	17	42 min
▶	4	Part Four	7.9	16	44 min

Full Cast & Crew

Cast

Kristin Thorne Self - Investigative Reporter

Adrienne Corson Self - Former FBI Intelligence Officer

Dave Schaller Self - Former Roommate and Friend of Amber Costello

Lynn Barthelemy Self - Mother of Melissa Barthelemy

Ray Tierney Self - District Attorney - Suffolk County

Sara Karnes Self - Friend of Maureen Brainard-Barnes

John Ray Self - Criminal Lawyer, Self - Criminal Attorney

Stephen Udice Self - Troop L Commander - New York State Police

Donna Sturman Self - Former Secretary of Rex Heuermann, Self - Former Secretary to Rex Heuermann

Stevie Smith Self - Sister of Shannan Gilbert

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