Season 4, Episode 1 - The Robotic Manipulation
Aired September 23, 2010
When Penny finds out that Sheldon has been talking to a girl, Amy Farrah Fowler, for months, she urges him to go out on a date with her. Penny soon finds herself going along for the ride as she accompanies Sheldon on his first ever date.
Meanwhile, Howard lands himself in an uncomfortable situation when he "borrows" a robotic hand from NASA and finds a creepy new use for the device.
Season 7, Episode 15 - The Locomotive Manipulation
Aired February 6, 2014
Amy surprises Sheldon with a romantic weekend that even he can't say no to: a weekend trip to Napa Valley aboard a vintage train with Howard and Bernadette. Meanwhile, when Leonard and Penny spend their Valentine's watching Raj's dog, their night ends with a journey to the vet.