Saba-Saba! Crucial Fist Failure is the forty-eighth episode of Juken Sentai Gekiranger.
After defeating Long with the Gekirangers, Rio returns to SCRTC much to the happiness of his teammates Miki and Gou. But the only ones who are not happy with Rio and Mele living with them are Ran and Retsu, who cannot forgive the two for the acts they have committed. To settle this, Rio and Mele set out to perform the Fist Judgement, a ceremonial battle where the judge and sinner would battle to the death. While Retsu and Ran spend three days training for the Fist Judgement, Jan attempts to talk Rio and Mele out of it. Rio tells Jan that he has found a new purpose, to bring the two branch schools together by first burning Rin Jū Hall to the ground. By the third day, the Fist Judgement begins, with Retsu fighting Rio while Ran battles Mele. In the middle of the fight, as Rio and Mele deliberately lower their guard, Sanyo immediately stops the proceedings as a revived Long reveals himself. Long then devours Sanyo, an extension of his being, and assumes his true form, the Infinity Dragon, before going after Jan first for being the one to ruin his schemes. At the last second, Mele takes full brunt of Long's wrath when she shoves Jan, Ran, Retsu from his jaws while being fatally wounded. Jan asks why Mele would do such a thing, she reveals that she and Rio intend to sacrifice themselves anyway, even if Long had not interfered, thanking Jan for what she did for them. Geki Tohja Wolf and SaiDaiOh battle Long, but are no match for him. After comforting Mele in her final moments, promising to follow her within minutes, Rio infuses the Gekirangers with the Rinki of the entire Akugata, promising Jan a rematch, before entering Long's body to destroy him from the inside, killing himself in the process. The Gekirangers' mourning for Rio is cut short as Long regenerates and mocks Rio's sacrifice, saying that can never die. Swearing on Rio and Mele's sacrifice while putting on the Kenma' Bracelet, Jan intends to stop Long once and for all.