Dateline NBC “Secrets by the Bay” August 16 2025 Recap & Preview

This Saturday, August 16, 2025, at 9/8c, Dateline NBC presents a haunting Weekend Mystery episode titled Secrets by the Bay, reported by Keith Morrison. The case takes viewers to San Diego, where the 2014 disappearance of Elizabeth Sullivan shocked a community and led to a mystery that would span years and raise unsettling questions about time, truth, and trust.

Elizabeth Sullivan, a young mother of two, vanished from her San Diego home without a trace. For nearly two years, her whereabouts remained unknown, despite public appeals and a missing persons investigation that yielded few answers. Then, in a stunning development, her body was discovered in the waters of San Diego Bay. But what investigators learned next deepened the mystery even further—medical examiners determined Elizabeth had only been dead for a month or two, despite being missing for nearly two years.

Keith Morrison guides viewers through the twists and turns of this baffling case, exploring how investigators pieced together Elizabeth’s final movements and began to unravel the secrets surrounding her disappearance. The episode examines her complicated personal life, strained relationships, and the suspicions that gradually took shape.

With interviews from law enforcement, loved ones, and those close to the investigation, Secrets by the Bay sheds light on a story where nothing is as it first appeared—and where the truth remained hidden beneath the surface for far too long.

Don’t miss this emotional and suspenseful Dateline episode, airing Saturday night on NBC and available to stream the next day on Peacock.