BBC One Wales and BBC Two network, 1 x 60mins, 2017.

Adventurer and writer Will Millard investigates Cardiff’s hidden history in this urban exploration of the Welsh capital. On an exhilarating and sometimes dangerous journey, Will goes in search of the lost stories that shows how Cardiff went from a tiny town to the thriving city it is today. From concealed tunnels to nuclear bunkers and from covered canals to derelict buildings, Will has unprecedented access to discover long-forgotten gems that reveal the city like you’ve never seen it before.

Co-production with Folk Films
Directed and produced by James Hale
Edited by John Gillanders
Exec-produced by Steve Robinson