
While many TV shows stumble with their endings, some do get better over time. However, even these shows rarely improve consistently. Agents of SHIELD is a good example: it evolved from a typical crime show into a complex sci-fi story, but still had some uneven seasons and changes in direction. Generally, the most successful shows are the ones that stay consistently good. But occasionally, a show manages to get better and better with each season, avoiding the usual decline in quality and building increasingly compelling and emotional stories on a strong foundation.