After 15 seasons, the crime procedural Criminal Minds [1] is finally coming to an end [2]. It's one of the longest-running dramas in TV history, and over the course of its seasons, it's had quite the revolving door of major cast members. While a handful have been part of the show since nearly the beginning, others have come and gone [3] in shorter stints. The one thing they all have in common: they all seem to have a blast working together [4], and the proof is clear on Instagram. As the show comes to an end, we've rounded up some of the best, funniest, and most heartfelt pics of the cast from over the years — check them out in the gallery ahead!