Which Leslie Nielsen film comedy series was based on the TV show "Police Squad!"?

According to a legend, which British king was seen in 1788 having a conversation with an oak tree? Which name belongs to both a legendary city of gold and a Cadillac model discontinued in 2002? A leghorn is a breed of which farm bird? A lepidopterist studies which insects? Which ruthless Russian ruled as tsar from 1547 to 1584? Complete the title of Marcus Pfister's picture book about sharing: "The Rainbow ___". An orange letter C with white trim is the logo of which NFL team? Which word sounds like a letter of the alphabet and means a former spouse?