Over the course of ten seasons, Smallville depicted Clark Kent's journey from shy farm boy to Earth's greatest hero. It is the longest and most complete superhero origin story ever told in live action. In fact, it is so long that episodes from Season 10 can often feel like they come from a completely different series than those from Season 1, and to a certain extent, they do.
Source：https://www.cbr.com/smallville-actual-trilogy-not-long-series/
