Valentine's Day flower in "The Locomotive Manipulation" Episode 15 of Season 7
Love is in the air when Sheldon and Amy join Howard and Bernadette for a trip to wine country. Meanwhile, Leonard (Johnny Galecki, right) and Penny (Kaley Cuoco, left) must rush Raj’s dog to the vet, on THE BIG BANG THEORY, Thursday, Feb. 6 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network. Photo: Michael Yarish/WBEI © 2014 WBEI. All rights reserved.