Warning: This The 100 article contains MAJOR spoilers for the show so far.

The 100 is not only about to launch Season 6, the post-apocalyptic drama just passed the fifth anniversary of its premiere. Before we turn our attention to the upcoming season and beyond, let’s take a moment to talk about all that this show has accomplished so far…

The 100 debuted on The CW on March 19th, 2014, forever changing our associations with Imagine Dragon’s “Radioactive,” and heralding in a fresh, new frontrunner in millennial-targetted programming. While some like to characterize The 100 first season as a slow-burn, a story that eventually got grittier or more serious as it went on, the truth is this was a show that knew what it was from the very beginning. Some of its best episodes came in that first run of episodes, immediately setting the tone for a series that would rarely pull its punches and wasn’t afraid to make its teenaged main characters into anti-heroes.

We’ve put together a list of nine episodes that define what The 100 has meant to the #PeakTV era.