: 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 .
: In the opening scene, the gang is watching the 1966 How the Grinch Stole Christmas! . Funnily enough, guest star Christine Baranski also appeared in the 2000 live-action film adaptation. [S3E11] The Maternal Congruence
: 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" . : This episode is notable for being the