I saw ep5 tonight on iPlayer as I was away yesterday. I'm liking that Dual has featured on all of the episodes so far. It's really fun to watch, and sometimes it's the original content that stands the test of time. Female Eliminator was a surprise - I wouldn't have wanted to be a betting man on that O.o
There are only 6 episodes left and there are meant to be quarter finals, semis and the final. That set-up would require 7 episodes, so all I can think of is that there will be 3 'quarters' (involving a play-off), 2 semis, 1 final.