"Twilight Zone" writers frequently used science fiction as a vehicle for social comment, as networks and sponsors who censored controversial material from live dramas were less concerned with seemingly innocuous fantasy and sci-fi stories. Frequent themes on "The Twilight Zone" included nuclear war, McCarthyism, and mass hysteria, subjects that were avoided on less serious primetime television. Episodes such as "The Monsters Are Due on Maple Street" and "I Am the Night—Color Me Black" offered specific commentary on current events and social issues. Other stories, such as "The Masks", "I Dream of Genie", or "Mr. Denton on Doomsday" were allegories, parables, or fables that reflected the moral and philosophical choices of the characters.