Jericho

When CBS canceled Jericho in May 2007, fans began sending nuts to CBS in reference to the shows final episode, in which the main character referenced the Battle of the Bulge when he answered "NUTS" to a request to surrender. Three weeks later, over 8 million nuts had been shipped to CBS NY and CBS LA offices totaling over 40,000 pounds. Nina Tassler, president of CBS, sent out a memo on 6 June 2007 saying they have ordered seven more episodes to air within the year. They also asked the fans to stop sending nuts...

In each episode of Jericho, a title card is accompanied with audio containing only Morse code (dots and dashes, or short and long beeps) which, when translated, provides a short hint (around 3 words) about the episode to come.