Secrets of the London Underground: Season 1, Episode 5

1 - 5: St Mary's, Aldgate East and Oxford Circus

Tim Dunn and Siddy Holloway have a night-time adventure as they go on a late-night exploration of two of London's least known stations: St Mary's and the original Aldgate East, they're only a few hundred metres apart but trains haven't stopped at either since 1938.