Howard Wolowitz in green plaid western shirt on The Big Bang Theory season 12 episode 4

Simon Helberg as Howard Wolowitz in green plaid western shirt by Salt Valley.

THE BIG BANG THEORY - SEASON 12 EPISODE 4

BUY SHIRT: SALT VALLEY TUFTS PLAID WESTERN SHIRT

PHOTO CREDIT: SCREENSHOT/CBS

Bernardette Rostenkowski in blue floral print maternity blouse on The Big Bang Theory season 12 episode 4

Melissa Rauch as Bernardette Rostenkowski in blue floral print maternity blouse by A Tea in the Pod.

THE BIG BANG THEORY - SEASON 12 EPISODE 4

BUY BLOUSE: A PEA IN THE POD MATERNITY PRINTED BLOUSE

PHOTO CREDIT: SCREENSHOT/CBS

Penny in red leopard print silk shirt on The Big Bang Theory season 12 episode 4

Kaley Cuoco as Penny in red leopard print silk shirt by Equipment.

THE BIG BANG THEORY - SEASON 12 EPISODE 4

BUY SHIRT: EQUIPMENT SLIM SIGNATURE SILK SHIRT IN RHUBARB LEOPARD PRINT

PHOTO CREDIT: SCREENSHOT/CBS

Bernardette Rostenkowski in red printed maternity tunic top on The Big Bang Theory season 12 episode 4

Melissa Rauch as Bernardette Rostenkowski in red printed tunic top by A Pea in the Pod.

THE BIG BANG THEORY - SEASON 12 EPISODE 4

BUY TUNIC: A PEA IN THE POD MATERNITY PRINTED BOHO TOP

PHOTO SOURCE: SCREENSHOT/CBS

Penny in white cable knit sweater on The Big Bang Theory season 12 episode 4

Kaley Cuoco as Penny in white cable knit v-neck sweater by Joie.

THE BIG BANG THEORY - SEASON 12 EPISODE 4

BUY SWEATER: JOIE GOLIBE CABLE SWEATER

PHOTO SOURCE: SCREENSHOT/CBS

Howard Wolowitz in blue checked shirt on The Big Bang Theory season 12

Simon Helberg as Howard Wolowitz in blue checked print shirt by Salt Valley

THE BIG BANG THEORY - SEASON 12 EPISODE 3

SHIRT: SALT VALLEY DELCO CHAMBRAY PLAID WESTERN SHIRT

PHOTO SOURCE: SCREENSHOT/CBS

Penny in green plaid print shirt on The Big Bang Theory Season 12

Kaley Cuoco as Penny in green and blue checked shirt by Equipment.

THE BIG BANG THEORY - SEASON 12 EPISODE 3

SHIRT: EQUIPMENT ADALYN PLAID PRINT SILK SHIRT

PHOTO SOURCE: SCREENSHOT/CBS

Penny in burgundy star print sweatshirt on The Big Bang Theory season 12

Kaley Cuoco as Penny in burgundy star print hooded sweatshirt by Sundry.

THE BIG BANG THEORY - SEASON 12 EPISODE 3

SWEATSHIRT: SUNDRY STAR PRINT HOODED SWEATSHIRT

PHOTO SOURCE: SCREENSHOT/CBS

Penny in blue and purple checked shirt on The Big Bang Theory season 12

Kaley Cuoco as Penny in purple and blue checked shirt from Rails.

THE BIG BANG THEORY - SEASON 12 EPISODE 3

SHIRT: RAILS TAITUM BUTTON DOWN SHIRT

PHOTO SOURCE: SCREENSHOT/CBS