Three Men on Alien Planet — Black

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Three People in Front of Chalkboard

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Man in Red Shirt — Yellow

1024 × 768

Five People in a Room — White

927 × 600

Man and Woman Couple — White

1024 × 768

Four Men in Suits — Black, Dramatic, Photograph, Atomic Symbol

2560 × 1600

Three Men on Alien Planet — Black, Dramatic

2560 × 1600

The Big Bang Theory logo

1280 × 800

The Big Bang Theory logo

1280 × 800

The Big Bang Theory cast

1280 × 1024

The Big Bang Theory scenes

1600 × 1200

Five People in Lab Setting

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