Sheldon Cooper in purple test print t-shirt The Big Bang Theory season 11 episode 9

Jim Parsons as Sheldon Cooper in purple test print t-shirt.

The Big Bang Theory, season 11 episode 9.

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Sheldon Cooper in blue Flash Super Villains t-shirt on The Big Bang Theory season 12

Jim Parsons as Sheldon Cooper in blue Flash print t-shirt from Junk Food Clothing.

The Big Bang Theory, season 11 episode 6 - The Proton Regeneration.

T-SHIRT: JUNK FOOD CLOTHING FLASH SIX SUPER VILLAINS MEN'S T-SHIRT at Amazon at Ebay

Sheldon Cooper in grey Marauders t-shirt on The Big Bang Theory season 11 episode 6

Jim Parsons as Sheldon Cooper in grey short sleeve Marauders printed t-shirt.

The Big Bang Theory, season 11 episode 6 - The Proton Regeneration.

T-SHIRT: HARRY POTTER THE MARAUDERS T-SHIRT