Gravity Falls Not What He Seems is an episode of Gravity Falls That changes everything forever.
The plot of this episode is that when Stan is arrested by federal agents Dipper and Mabel begin to wonder who he really is. This episode in very intense especially during that last 2 minutes. Stan is pretty awesome in this episode and does some incredible stuff. I liked Soos a lot during this episode because it shows he is really a good person. This episode answers a lot of big questions and leaves even more mysteries to solve. The ending in particular is really jaw dropping. I give this episode 6 out of 5 stars because 5 stars can't do it justice. By Nick Starceski