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 9, Episode 7 - The Spock Resonance
Aired November 5, 2015
While being interviewed for a documentary about Spock from "Star Trek," Sheldon struggles to suppress his emotions about his recent break-up with Amy. Also, Wolowitz and Bernadette butt heads over remodeling his childhood home.