2021 | 25 Episodes

Season 1 of Dateline: Unforgettable premiered on March 8, 2021.

2022 | 48 Episodes

Season 2 of Dateline: Unforgettable premiered on June 7, 2022.

2024 | 11 Episodes

Season 3 of Dateline: Unforgettable premiered on January 18, 2024.

2024 | 10 Episodes

Season 4 of Dateline: Unforgettable premiered on June 6, 2024.

2025 | 8 Episodes

Season 5 of Dateline: Unforgettable premiered on January 16, 2025.

2025 | 8 Episodes

Season 6 of Dateline: Unforgettable premiered on June 5, 2025.