Ep 3. The Bachelor Party Corrosion

After Sheldon and Amy announced their plans to move in together, the boys decide to throw a bachelor party for the soon-to-be cohabiting couple. However, things start to go awry as the gang's typical "geeky" party ideas clash with Sheldon's desire for a more traditional, old-fashioned celebration. Meanwhile, Bernadette and Penny plan a bachelorette party for Amy, but get sidetracked when they accidentally ingest a questionable substance. As the night progresses, tensions rise and friendships are tested as everyone struggles to find the right balance between fun and responsibility. With Sheldon's preconceived notions about bachelor parties and the girls' wild shenanigans, The Bachelor Party Corrosion is a hilarious and heartwarming episode that showcases the unique personalities and relationships of The Big Bang Theory gang.