Special 9 (S4, Ep 31) - "The Final Episode"
A qualifying obstacle course race is held in five different prefectures. The fastest contestants from each of these areas are taken back to the castle to compete for the titles of fastest man and fastest woman.
No 'Show Down', instead the fastest man and woman in the 'Ultimate Showdown' win 1 million yen each.
This weeks games (in order) are:
Snow Lane
Streets Ahead
Oh Deer
Oh Ma Ha Beach
Rat Race
High Rollers
Wipeout
Ultimate Showdown
(Japanese Ep 131 - "Obstacle Course Special")