[s3e11] The Maternal Congruence File

: This episode is notable for being the first of only two in the series where a main character— Raj Koothrappali —appears but has no speaking lines .

: After feeling neglected by Leonard, Penny takes Beverly out for drinks. The legendarily uptight neuroscientist eventually loosens up over tequila shots, leading to a hilarious bonding session where she begins to treat Penny as her "home girl" . [S3E11] The Maternal Congruence

: In a drunken state, Beverly returns to the apartment and unexpectedly kisses Sheldon on the lips before deciding she'd actually rather "have the busboy" from the bar. Trivia & Highlights : This episode is notable for being the

: Sheldon objects to traditional Christmas decorations, instead hanging a bust of Sir Isaac Newton on the tree because Newton was born on December 25th, unlike the historical figure typically associated with the holiday. : In a drunken state, Beverly returns to

As Leonard and Penny prepare for Christmas, Leonard fails to mention that his brilliant yet emotionally distant mother is coming to town. When Beverly arrives, the tension quickly mounts: