In the fourth series, Tim also explores the history of railway design with special access to the Network Rail archives – the first time this repository of railway history has been featured on TV – and the archives of the National Railway Museum, a treasure trove full of architects’ plans, drawings and rare artefacts, containing the untold histories of railway buildings.

Season 3 of House of the Dragon premiered on September 13, 2021.

Season 2 of House of the Dragon premiered on January 19, 2021.

Season 1 of House of the Dragon premiered on April 28, 2020.