A lot has happened during the nine seasons of Big Bang Theory. The cast has grown from five main characters to seven, or eight regular characters – if you include Stuart. Everyone has grown as a character, made important life decisions, but always continued to come up with crazy antics and put themselves in awkward situations.
So, we’ve gathered the top 5 biggest moments in the show so far to see just how far the characters have come since that fateful day Penny moved in across the hall from Sheldon and Leonard. If it hadn’t been for that moment, many of the biggest and most life changing moments wouldn’t have happened.
Videos by PopCulture.com
What are your favorite Big Bang Theory moments?

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Howard and Bernadette Get Married
[H/T YouTube/Wozamil]
Howard’s Mom Dies
[H/T YouTube/RLR]
Penny and Leonard Get Married – Twice
[H/T YouTube/Funny Stuff]
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[H/T YouTube/The Big Bang Theory]
Amy and Sheldon Have “Coitus”
[H/T YouTube/Shamy Central]
Howard and Bernadette Have a Baby
[H/T CBS]
BONUS: Raj Gets Cinnamon
[H/T YouTube/Lord Treadwell]
BONUS: Raj Gets Cinnamon
[H/T YouTube/Lord Treadwell]
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Beverly Hills, CA – January 31, 2026: Jelly Roll, left, and Bunnie Xo, right, pose for portraits on the red carpet during the 68th GRAMMY Awards Pre-GRAMMY Gala & GRAMMY Salute to Industry Icons Honoring Avery Lipman & Monte Lipman at the Beverly Hilton on Saturday, Jan. 31, 2026 in Beverly Hills, CA. Clive Davisโ annual pre-Grammy party hosts an array of A-listers from entertainment, sports, and politics to come together and enjoy performances. (Kayla Bartkowski/ Los Angeles Times)







