Orson Welles was a famous American actor, director and producer best known for his 1941 film 'Citizen Kane' and his 1938 radio dramatization of 'The War of the Worlds' by H.G. Wells which convinced some listeners of an actual Martian invasion. Welles directed the radio play to sound like a news broadcast, using music, reporters describing events and a scientific explanation. While some saw it as a hoax, others panicked due to the realism of the broadcast and tensions around a potential World War II, illustrating the power of radio to influence audiences. The broadcast remains both controversial and influential to this day.