Raj's Speaker/Soundtrack Shirt from the big bang theory

Raj's Speaker/ Soundtrack Shirt

This Raj's Speaker/ Soundtrack Shirt was worn in big bang theory in s03e16.Raj Thinks He's Awesome and Will Be Feared.
Raj is giving himself dramatic entrance music so people will know he's awesome and to be feared. Howard though, thinks there's nothing more awesome and frightening than a man who has music blasting from between his nipples.

Howard's Batgirl Costume from the big bang theory

Howard's Batgirl Costume

This Howard's Batgirl Costume worn in s03e19,The gang loses a bet and is forced to wear female superhero costumes! How funny.

Howard's Superman Belt Buckle in the big bang theory

Superman Belt Buckle

This Superman Belt Buckle As worn by Howard in Season 1, Episode 14 (The Nerdvana Annihilation).
Howard Wolowitz has also been spotted in a number of different Superman belt buckles,this is one of them.

Leonard's Caffiene Molecule T Shirt from big bang theory

Caffiene Molecule T-Shirt

This Leonard's Caffiene Molecule T Shirt  from big bang theory As worn by Leonard in Season 1, Episode 2 (The Big Bran Hypothesis),and S01E05，the scene of leonard
was practicing the violin with leslie in leonard and sheldon's apartment.

Official Hoodie Big bang theory Bazinga hoodie - red and black

Bazinga hoodie

Sheldon began using the term "bazinga" as a follow-up to jokes, pranks, and chuckle-filled "gotcha" situations just before the third season started.
These Bazinga hoodies are brand new and Officially licensed branded products, Available in black and red.

Official Shirts Knock Knock Knock Penny T Shirt

Knock Knock Knock Penny T Shirt

This is an officially licensed Big Bang Theory Penny t-shirt in which this Big Bang Theory t-shirt has been screen printed with Big Bang Theory imagery on the front.
That is the most classical Sheldon's knock,and probably the funniest knock ritual in TV history.What more can i say ?

Sheldon's Manbot T Shirt from the big bang theory

Manbot T-Shirt wron by sheldon

This green Manbot T-Shirt wron by sheldon in Season 1, Episode 14 (The Nerdvana Annihilation); Season 2, Episodes 1 (The Bad Fish Paradigm), 9 (The White Asparagus Triangulation), 11 (The Bath Item Gift Hypothesis) and 22 (The Classified Materials Turbulance); and Season 3, Episodes 2 (The Jiminy Conjecture) and 19 (The Wheaton Recurrence); and Season 4, Episodes 2 (The Cruciferous Vegetable Amplification), 7 (The Apology Insufficiency) and 19 (The Zarnecki Incursion)
Sheldon has worn this shirt in green, blue and purple.

Sheldon's Batman logo T shirt in big bang theory

Batman logo T shirt

This Batman logo T shirt is Neon Gradient Color,worn by Sheldon in Season 4, Episode 7 (The Apology Insufficiency)

Sheldon's Red Robot Evolution T Shirt from the big bang theory

Robot Evolution T-Shirt worn by sheldon

This Robot Evolution T-Shirt from the big bang theory,worn by Sheldon in Season 1, Episode 13 (The Bat Jar Conjecture); Season 2, Episode 8 (The Lizard-Spock Expansion); and Season 4, Episodes 3 (The Zazzy Substitution), 10 (The Alien Parasite Hypothesis)and 19 (The Zarnecki Incursion)
Remember, evolution is an ongoing process! Take the next step on the evolutionary ladder by watching "The Big Bang Theory" and ordering this t-shirt featuring the roommates' personal theory regarding the future of the human race. Anybody else looking forward to having metal claws?