The request regarding "[S2E5] While You Were Away " typically refers to the episode , though "While You Were Away" is technically the eighth episode of Season 3, not Season 2. If you are looking for information on a 2019 Singaporean drama titled While You Were Away (一切从昏睡开始), it originally aired as a single-season 20-episode series and does not have a "Season 2 Episode 5". Ben 10: Omniverse Details
: Rook's younger brother, Young One, arrives on Earth in a harvester, leading Ben and Rook back to Revonnah only to find it has been invaded by the Incurseans . [S2E5] While You Were Away
In this episode, the plot centers on and Ben Tennyson traveling to Rook's home planet, Revonnah. The request regarding "[S2E5] While You Were Away