In Season 18 (projected/upcoming), Episode 5 involves a multi-week challenge where contestants must form alliances and rank each other.
The code typically refers to the fifth episode of an eighteenth season. The most prominent show with this specific numbering is the legendary motoring program Top Gear . Top Gear (UK) - Series 18, Episode 5 [S18E5] Episode #18.5
Richard Hammond conducts a spectacular race in the Alps, pitting a rally-spec Skoda Fabia S2000 against Swiss stuntman Yves Rossy, who uses a rocket-powered wing to fly through the mountains. In Season 18 (projected/upcoming), Episode 5 involves a