Big Bang Theory S01 -

Introduces the iconic "Soft Kitty" song, used to soothe a sick Sheldon.

: The series kicks off with Leonard and Sheldon attempting to donate to a high-IQ sperm bank, only to abandon the idea. Upon returning home, they meet Penny, setting the stage for the series' central "nerd meets girl" dynamic. big bang theory s01

Penny pours herself a cookie, eyes the whiteboard filled with equations and a crude sketch of a superhero wearing goggles. Introduces the iconic "Soft Kitty" song, used to

: This season introduced many of the series' lasting hallmarks, including the "Soft Kitty" song and early versions of Sheldon’s unique humor . Reception and Cultural Impact Penny pours herself a cookie, eyes the whiteboard

: An outgoing waitress whose common sense often contrasts with the guys' academic brilliance.

The Big Bang Theory's first season laid the groundwork for a successful and beloved show that would run for 12 seasons, inspiring countless fans and leaving a lasting impact on popular culture.

The main cast is rounded out by their equally eccentric friends: