User blog comment:O Raz3r O/My Ranking of the 12 UK Series/@comment-9751413-20180918121031

The worst part of Series 4 was the Sumo only appearing in half of the episodes. Yes, it made sense to place two in an episode, as who wants to dedicate a whole segment to a 4 second pushoff, but if you're going to do that, record 32 robots!