Saving Stefan's Face
British soldier Wayne Ingram was on duty in Bosnia in 2003 when he met Stefan Savic, a four-year-old boy who was born with a life-threatening facial cleft. He made a pledge to help him, and raised money for a series of operations over the next ten years. Matthew also talks to David Dunaway, the British surgeon who carried out most of the procedures.
Paulo Ito is a street artist in the Brazilian city of Sao Paulo. His mural of a poor child who only has a football to eat on his dinner plate has recently gone viral - he takes reporter Gibby Zobel on a tour of street art in his neighbourhood.
Country music legend Dolly Parton describes her poor childhood growing up in the Tennessee mountains, where her family used newspapers as wallpaper. She explains why she's been inspired to set up a global literacy project.
Francesco Sauro is an Italian caver who loves to burrow thousands of feet below the earth's surface. He has explored caves all over the world, and even helps to train astronauts for the European Space Agency.