Season 7, Episode 6 - The Romance Resonance
Aired October 24, 2013
When Sheldon is at the center of an amazing scientific discovery, his excitement soon turns to dismay when he realizes he made a mistake. Meanwhile, to celebrate the anniversary of their first date, Howard surprises Bernadette with a romantic gesture that includes the whole gang. Howard's affectionate display causes Penny to up her romantic game with Leonard.
Season 10, Episode 13 - The Romance Recalibration
Aired January 19, 2017
After Penny starts to feel like Leonard is taking her for granted, she chooses to go on a spa weekend with Amy. When Leonard and Sheldon gatecrash the trip, Sheldon offers to help Leonard and Penny improve their marriage by drafting their very own "relationship agreement."
Meanwhile, Howard and Raj think up inventive ways to try fix a squeaky floorboard in baby Halley's room.