Interestingly, the show almost ended at Season 4. Negotiations between AMC and Sony Pictures Television were tense. Had they failed, Season 4’s finale would have served as a series finale. Thankfully, the deal was struck for a final 16 episodes (Season 5). This specific count allowed the show to tie up loose ends (the disappearer, the Nazis, the Grey Matter company) without rushing the emotional beats.
While the original series has 5 seasons, the story continues in other media. If you finish the 62 episodes and want more, you have: how many seasons of breaking bad
These seasons follow a consistent format as the stakes and Walt's "Heisenberg" persona grow. Interestingly, the show almost ended at Season 4