The Big Bang TheorySeries 10 Episode 5: The Hot Tub Contamination
Things don't run smoothly as Amy and Sheldon's cohabitation experiment continues, forcing Leonard and Penny to intervene when the couple have an argument about the 'bathroom schedule'. Howard and Bernadette cancel their holiday plans when Bernadette feels unwell. They decide to have a secret stay-cation at home instead, but are disturbed by unexpected guests dropping by.
- Original air date