Eddie Butler presents a series that reveals some extraordinary stories about Wales and the history of the world.

A series looking at the work of the Royal Commission on the Ancient and Historical Monuments of Wales celebrating its centenary year.

After Police Captain Dan McLaren becomes police commissioner, former detective Johnny Blake publicly punches him, convincing rackets boss Al Kruger that Blake is sincere in his effort to join the mob. "Bugs" Fenner, meanwhile, is certain that Blake is a police agent.