418 The Prestidigitation Approximation March 10, 2011 Mark Cendrowski Priya talks Leonard into getting contact lenses.
Sheldon and, howard become more involved in their girls /girlfriends and, penny realizes her true feelings for, leonard following their third season break-up, especially after Leonard begins to date.They break up over who's profession is more important which causes Sheldon to start collecting cats.Howard demonstrates a robotic arm, that he "borrowed" from the.405 The Desperation Emanation October 21, 2010 Mark Cendrowski When Amy Farrah Fowler decides to introduce Sheldon to her mother, it worries Sheldon.Penny, kunal Nayyar, rajesh Koothrappali, mayim Bialik, amy Farrah Fowler.He enlists Penny's help to get Bernadette back but she insists that Wolowitz tell her the reason they broke up in the first place - something he has never spoken about.She and Leonard apparently have a history, despite Leonard 's pinky swear with Howard that they would not interact with her in deference to Raj.Much to Penny 's annoyance, she and Zack end up going to the comic book store New Year's Eve party as Wonder Woman and Superman.After she and Sheldon decide that Amy is horny, Sheldon sets her up on a date with Zack.Cast, episodes, episode (Season/Ep title, original Air file sync windows 2012 Date, directed.
417 The Toast Derivation February 24, 2011 Mark Cendrowski Sheldon is upset when he realizes Leonard is the center of their group of friends.
Throughout the season, both.
415 The Benefactor Factor February 10, 2011 Mark Cendrowski President Siebert makes the gang attend a fundraiser for the university.
They hook up, but are discovered by Sheldon, who devises an elaborate lie to cover.
424 The Roommate Transmogrification May 19, 2011 Mark Cendrowski Leonard and Priya decide to live together in Raj's Apartment, while Raj book on history of economic thought pdf can become Sheldon 's roommate.
403 The Zazzy Substitution October 7, 2010 Mark Cendrowski Sheldon and Amy Farrah Fowler are very compatible with each other.
Sheldon Cooper, johnny Galecki, leonard Hofstadter, kaley Cuoco.Howard fights with his mother and moves out.402 The Cruciferous Vegetable Amplification September 30, 2010 Mark Cendrowski Sheldon determines that his best estimate for his life expectancy by changing his diet and then building a robot to take his place.Season 4, episodes 24, premiere Date, september 23, 2010, finale Date.408 The 21-Second Excitation November 11, 2010 Mark Cendrowski Sheldon, Leonard, Raj, and Howard excitedly plan to attend a screening of Raiders of the Lost Ark that includes 21 seconds of never-before-seen footage.Penny comes to know of, sheldon 's new friend and asks him to take Amy on a date which she ends up chaperoning.Leonard quickly recruits Howard, Raj, and reluctantly Sheldon who becomes too obnoxious and gets bumped from the team.Howard and Raj perform a magic trick that Sheldon becomes obsessed with figuring out.What's New, cast, see All Cast, jim Parsons.To everyone's surprise, Sheldon announces his plans to conceive a progeny with.Melissa Rauch, bernadette, simon Helberg, howard Wolowitz.412 The Bus Pants Utilization January 6, 2011 Mark Cendrowski Sheldon, Howard, and Raj are eating together in the Cafeteria when Leonard approaches them with an idea for a smartphone app that helps users solve Differential Equations.Later, Penny informs him that her critical father Wyatt is visiting, and she asks him to pretend that they're back together because he's the only boyfriend she's ever had that her father likes.