There are several TV shows that have managed to be consistently good from the first episode to the finale, but one of the most notable examples is Breaking Bad.

Breaking Bad is a critically acclaimed American crime drama television series created by Vince Gilligan. It aired on AMC from 2008 to 2013 and starred Bryan Cranston as Walter White, a high school chemistry teacher who turns to producing and selling methamphetamine to secure his family's financial future after he is diagnosed with cancer.

The show received widespread critical acclaim for its writing, cinematography, acting, and direction, and it won numerous awards, including 16 Primetime Emmy Awards. One of the reasons for its success is the consistent quality of the storytelling and character development, as well as the show's ability to maintain tension and suspense throughout its five seasons.

Overall, Breaking Bad is a great example of a TV show that managed to be consistently good from start to finish and is widely regarded as one of the greatest television series of all time.