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Season 1

2021 | 6 Episodes

Season 1 of Secrets of the London Underground premiered on July 19, 2021.

Season 2

2022 | 10 Episodes

Season 2 of Secrets of the London Underground premiered on May 5, 2022.

Season 3

2023 | 10 Episodes

Season 3 of Secrets of the London Underground premiered on July 4, 2023.

Season 4

2024 | 10 Episodes

Season 4 of Secrets of the London Underground premiered on July 2, 2024.

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