Due to his failure to save the President, Shep's superior officer (Roy Dotrice) suggests that he is "stressed out" and should take a vacation. Annoyed, Shep accidentally smashes his control systems and is forced to crash land on Earth, where he realizes he will have to stay until his spaceship repairs itself. Shep has little knowledge of Earth's customs, and his temper and sense of justice cause problems with everyone he meets, especially a mime artist he tries to help in various comical fashions, such as freeing him from his 'invisible box'.