In the episode, titled The Schizoid Man, No. 6 has successfully convinced No. 2 that No. 6 is actually someone else. He gets into a helicopter that has skids that are visible as it flies away from The Village. The first cut reveals that the helicopter now has pontoons instead of the skids it had started with. No. 6 didn't escape probably because he had gotten onto the wrong helicopter and tried to change in mid-air(JOKE).