Cast of the Big Bang Theory
Photography by Mark Mann

It's been hard to wrap our heads around the reality that the longest-running multi-camera series in TV history will be going out with a bang. The Big Bang Theory will debut its 12th and final season starting Sept. 24 on CBS and CBS All Access—so get ready to soak up every second of Sheldon, Amy, Leonard, Penny, Simon, Bernadette, and Raj!

We're feeling nostalgic for the CBS comedy, so we've rounded up some of the coolest photographs Watch! has captured of the Big Bang cast. These are the only pictures you need to see today.

Photography by Mark Mann.

Watch the Season 12 premiere of The Big Bang Theory on Monday, Sept. 24 at 8/7c on CBS and CBS All Access.

Need a ride, Jim Parsons?

Jim Parsons of The Big Bang Theory holding a Boise sign next to a toy car

Photography by Art Streiber

When he isn't playing supergenius Dr. Sheldon Cooper on The Big Bang Theory, Jim Parsons makes the crew laugh during a hilarious car-themed photo shoot for our April 2012 comedy issue.

Photography by Art Streiber.

Experience the not-so-final frontier with Mayim Bialik

Mayim Bialik of The Big Bang Theory dressed as Brent Spiner aka Data from Star Trek

Photography by Christopher Ross

To celebrate Star Trek at 50, Mayim Bialik boldly went where no man—or woman—has gone before for a stellar photo shoot in our August 2016 issue. Here she channels Data (Brent Spiner) from Star Trek: The Next Generation.

Photography by Christopher Ross.

Kaley Cuoco is oh-so-pretty in pink

Kaley Cuoco of The Big Bang Theory in a pink dress holding a silver teapot

Photography by Jeff Lipsky

Tea time with Penny is our favorite time of day! Watch! took Kaley Cuoco to the English countryside for a pastoral photo shoot in our August 2011 issue, where TV's knockout neighbor made quite the stunning impression.

Photography by Jeff Lipsky.

Burger bliss with Johnny Galecki

Johnny Galecki of The Big Bang Theory with a burger and fries and bloody mary

Photography by Keiron O'Connor

We can't help but grin when we gaze at this happy moment with Johnny Galecki. Captured at Bar Boulud in London for our December 2013 issue.

Photography by Keiron O'Connor.

Melissa Rauch shines on the red carpet.

Melissa Rauch of The Big Bang Theory in a black dress with a velvet bow

Photography by Cliff Lipson

One of television's hottest—and funniest—stars, Melissa Rauch, visited the CBS Photo Booth for the People's Choice Awards in 2017. This pretty portrait is definitely a keeper.

Photography by Cliff Lipson.

Simon Helberg is a suave scientist.

Simon Helberg of The Big Bang Theory in a checkered jacket with satin lapels and purple shirt

Photography by Cliff Lipson

When not playing aerospace engineer and astronaut Howard Wolowitz, handsome Simon Helberg trades the comic book tees and tight pants for a designer tuxedo in this glam photo shoot for our October 2009 issue.

Photography by Cliff Lipson.

Mayim Bialik takes our breath away.

Mayim Bialik of The Big Bang Theory in a long black dress on a staircase in Tel Aviv

Photography by Gilles-Marie Zimmermann

CBS's leading lady had a memorable Watch! shoot in Israel for our April 2016 issue. Here, Mayim Bialik poses in the home of her first cousin and poet Hayim Nahman Bialik in Tel Aviv. She couldn't be more beautiful.

Photography by Gilles-Marie Zimmermann.

Kunal Nayyar gets serious for his cover shot.

Kunal Nayyar of The Big Bang Theory with a striped polo shirt and blue plaid jacket

Photography by Mark Mann

He may play perpetually single Rajesh "Raj" Koothrappali on The Big Bang Theory, but in real life, heartthrob Kunal Nayyar is absolutely ready for his close-up in our October 2009 issue.

Photography by Mark Mann.

Kaley Cuoco takes us on a haute ride.

Kaley Cuoco in a tweed suit inside a car holding sunglasses

Photography by Patrick Demarchelier

Madonna's iconic and controversial "Justify My Love" music video was the inspiration for this jaw-dropping photograph. Kaley Cuoco channels the Material Girl to perfection in our October 2010 issue.

Photography by Patrick Demarchelier.

Amazing photos of The Big Bang Theory stars that we can't get enough of

The Big Bang Theory cast

Photography by Mark Mann