Season 18, Episode 5, titled "The Serpent's Cove," follows a veteran and a cattle rancher trying to survive 21 days in the Philippine jungle.
Episode 18.5, "Recollection," is similarly a compilation episode summarizing the first half of the Alicization arc. [S18E5] Episode #18.5
In Season 18 (projected/upcoming), Episode 5 involves a multi-week challenge where contestants must form alliances and rank each other. Season 18, Episode 5, titled "The Serpent's Cove,"
Episode 18.5, titled "All of This," is a recap episode that summarizes the events of the series up to that point. Community consensus on Reddit generally suggests it is skippable if you are binge-watching. titled "The Serpent's Cove