ABC’s Nightline, celebrating 45 years of delivering the most powerful stories of our time. Nightline’s historic 45th anniversary shows - all this week, late night after Kimmel on ABC - and stream next day on Hulu. | Nightline

Alexis Linkletter hosts the “Unraveled” podcast, which dives into unsolved true crime investigations, including the case of the so-called Long Island Serial Killer. She joins ABC News’ Ashan Singh to discuss the case with “IMPACT” by Nightline, and shares how she hopes to find answers for families of the victims. “Gilgo Beach Murders: A Serial Killer’s Secrets?” is streaming now on Hulu. New episodes drop every Thursday. | Nightline