What he told me made my blood run cold - Michael Sheen investigates Wales' toxic legacy

Michael Sheen is a famous actor. He is looking into a problem in Wales. People say bad chemicals were left in many places there. These chemicals can cause cancer. Michael wants to know more about this. He wants to help people understand what happened.

Michael Sheen is worried about Wales. He thinks the chemicals are dangerous. He is trying to find out where they are. He wants to make sure people are safe. He is working hard to learn the truth. This is important for the health of everyone in Wales.