The act of putting a plan into action or starting to use something.
Season 3, Episode 22 - The Staircase Implementation
Aired May 17, 2010
After a disagreement with Sheldon, Leonard tells Penny the story of how he moved into the apartment building, became friends with Sheldon, and how the elevator was broken.
Season 4, Episode 22 - The Wildebeest Implementation
Aired May 5, 2011
When Bernadette and Howard are going to have a dinner with Leonard and Priya, Amy and Penny recruit Bernadette as a double agent to spy on Priya. Meanwhile, Raj tries out a new medication to cure his social anxiety.
Season 6, Episode 18 - The Contractual Obligation Implementation
Aired March 7, 2013
Leonard, Sheldon and Howard visit Howard's old school to speak to junior high girls about careers in science. Meanwhile, Raj plans his first formal date with Lucy, while the girls visit Disneyland and dress up as Disney princesses.
Season 8, Episode 20 - The Fortification Implementation
Aired April 9, 2015
When Sheldon feels down about being left out of a physics symposium, Amy suggests they spend their date night building a fort, which leads to a new development in their relationship.
When Penny appears on Wil Wheaton's podcast and reconsiders her decision to quit acting, she and Leonard have a huge on-air argument. Meanwhile, after Howard gets the title deed to his mother's old house, he is surprised when an unknown relative turns up on the doorstep.
Season 9, Episode 5 - The Perspiration Implementation
Aired October 19, 2015
When the guys sign up for fencing class taught by Barry Kripke, Sheldon finds himself in an uncomfortable position after Kripke expresses an interest in Amy. Meanwhile, the girls try to help Stuart attract more female shoppers to his comic book store.