Rhys Williams investigates the deadly rail disaster in Greece in February, when an InterCity passenger train collided head-on with a freight train, killing 57 people. He meets victims, bereaved families and those in the industry who issued multiple warnings in the lead up to the disaster. Elsewhere in a Mexico City suburb, Rageh Omaar visits the altar of 'Santa Muerte' or Holy Death, a 21st century deity that accepts and nurtures the outcasts who feel neglected and rejected by mainstream religion.
