The Big Bang Theory
The Porkchop Indeterminacy
S1 E15:
Leonard, Wolowitz, and Koothrappali all become smitten with Sheldon's twin sister, Missy (guest star Courtney Henggeler), and Leonard devises a plan to eliminate his rivals. The plan backfires, however, when Sheldon declares he will decide whom his sister dates.
Starring
Courtney Henggeler