Lesson 48: Saba-Saba! And Now, Judgement Fist

'''Saba-Saba! Crucial Fist Failure''' is the forty-eighth episode of Engine Sentai Go-Onger.

Plot
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 Mere living with them are Ran and Retu, who cannot forgive the two for the acts they have committed. To settle this, Rio and Mere set out to perform the Fist Judgement, a ceremonial battle where the judge and sinner would battle to the death. While Retu and Ran spend three days training for the Fist Judgement, Jyan attempts to talk Rio and Mere out of it. Rio tells Jyan 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 Retu fighting Rio while Ran battles Mere. In the middle of the fight, as Rio and Mere 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 Jyan first for being the one to ruin his schemes. At the last second, Mere takes full brunt of Long's wrath when she shoves Jyan, Ran, Retu from his jaws while being fatally wounded. Jyan asks why Mere would do such a thing, she reveals that she and Rio intend to sacrifice themselves anyway, even if Long had not interfered, thanking Jyan for what she did for them. Geki Tohja Wolf and SaiDaiOh battle Long, but are no match for him. After comforting Mere in her final moments, promising to follow her within minutes, Rio infuses the Gekirangers with the Rinki of the entire Akugata, promising Jyan 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 Mere's sacrifice while putting on the Kenma' Bracelet, Jyan intends to stop Long once and for all.