2021 | 8 Episodes

Season 1 of Mel Giedroyc: Unforgivable premiered on February 2, 2021.

2022 | 8 Episodes

Season 2 of Mel Giedroyc: Unforgivable premiered on February 8, 2022.

2022 | 8 Episodes

Season 3 of Mel Giedroyc: Unforgivable premiered on September 20, 2022.

2024 | 8 Episodes

Season 4 of Mel Giedroyc: Unforgivable premiered on March 12, 2024.