Episode three of the LSD saga, charts the launch of Operation Julie - an unprecedented police operation which aims to bring down the Microdot Gang. For detective Stephen Bentley it means a life-changing mission, as he's sent deep undercover... to become a hippy.

In the 1970s it's estimated that around 60% of the world's LSD came from one place: Wales. This is the story of the Microdot Gang - a rag tag group of chemists, dealers, businessmen and hippy dreamers. They believed that acid had the power to save the world.

Narrated by Rhys Ifans (House of the Dragon, Notting Hill, Harry Potter) and starring Hannah Murray (Game of Thrones, Skins), Acid Dream is written by Welsh playwright Tim Price and features original music from Super Furry Animals frontman Gruff Rhys.

Written by Tim Price

Narrator.... Rhys IfansChristine.... Hannah MurrayContributors.... Alston Hughes, Stephen Bentley and Catherine HayesOriginal music.... Gruff RhysSound design.... Peregrine Andrews.Researcher.... Hayley MillsProduction Co-ordinator.... Caroline BarlowExtracts read from The Untold Story of Christine Bott

Producer.... James Robinson

A BBC Studios production.