The Maternal Congruence

"The Maternal Congruence" is the second Christmas-themed episode of the CBS sitcom The Big Bang Theory, originally produced and aired as the 11th episode from the third season. It aired on December 14, 2009.

Synopsis

A visit from Leonard's mother, Dr. Beverly Hofstadter (Christine Baranski), delights Sheldon and horrifies Leonard. Penny is upset because Leonard didn't mention his mother's visit to her, but that is nothing compared to when Leonard learns that Sheldon knows more about his own mother than Leonard does.

Availability

The episode was featured on The Big Bang Theory: The Complete Third Season DVD and Blu-ray sets, released on September 14, 2010. The episode was also included, along with "The Bath Item Gift Hypothesis" and "The Santa Simulation", on The Big Bang Theory Holiday Episodes DVD, released exclusively ay f.y.e. in 2013.

This page about a Christmas special or an episode from a television series with a Christmas theme is a stub. Please help the Christmas Special Wiki by expanding this article.

Warner Bros.

Movies
Warner Bros. Pictures	Christmas in Connecticut • Gremlins • Lethal Weapon • National Lampoon's Christmas Vacation • Jack Frost • Fred Claus
New Line Cinema	Elf • The Nativity Story • Four Christmases • A Very Harold & Kumar 3D Christmas • The Conjuring 2 • Shazam!
Blue Ribbon Content	A Christmas Story 2 • A Cinderella Story: Christmas Wish
Made-for-TV movies	National Lampoon's Christmas Vacation 2: Cousin Eddie's Island Adventure • The Year Without a Santa Claus

Live-action television episodes
**Friends and Joey**	"The One With Phoebe's Dad" • "The One Where Rachel Quits" • "The One With the Girl from Poughkeepsie" • "The One With the Inappropriate Sister" • "The One With the Routine" • "The One With the Holiday Armadillo" • "The One With the Creepy Holiday Card" • "The One With Christmas in Tulsa" • "Joey and the Plot Twist" • "Joey and the Christmas Party"
DC Comics	"Season's Greedings" • "Home is Where the Hurt Is" • "Twas the Night Before Mxymas" • "Lexmas" • "Gemini" • "Year's End" • "Three Ghosts"
Other shows	"A Semi-Merry Christmas" • "Mel, the Magi" • "Mel's Christmas Carol" • "'Tis the Season to Be Jealous" • "A Christmas Story" (Growing Pains) • "A Christmas Story" (Just the Ten of Us) • "Santa on the Lam" • "Miracle on Elm Street" • "The Christmas Show" • "Fa La La La Laagghh!" • "The Man Who Canceled Christmas" • "It Came Upon a Midnight Clear" • "Deck the Malls" • "Christmas Day-Ja Vu" • "A Country Christmas" • "How the Finch Stole Christmas" • "Meet the Cuban Parents" • "Christmas Punch" • "A Clear and Presentless Danger" • "George Is Being Elfish and Christ-Misses His Family" • "Santa's Secret Stuff" • "A Very Supernatural Christmas" • "The Bath Item Gift Hypothesis" • "Christmas" (The Middle) • "It's Beginning to Stink a Lot Like Christmas" • "The Maternal Congruence" • "Jolly Red Elf" • "The World Ain't Over 'Till It's Over" • "The Santa Simulation" • "Give Santa a Tail-Hole" • "Home for Christmas"

Animated productions
Looney Tunes and related shows	The Shanty Where Santy Claus Lives • Bedtime for Sniffles • Gift Wrapped • Bugs Bunny's Looney Christmas Tales • "It's a Wonderful Tiny Toons Christmas Special" • "'Twas the Day Before Christmas" • "Jingle Boo" • "The Great Wakkorotti: The Holiday Concert" • "A Christmas Plotz" • "Little Drummer Warners" • "No Time for Christmas" • "A Pinky and the Brain Christmas" • "It Happened One Night Before Christmas" • "In Arms Way" • "The Twelve Days of Christmas" • Christmas Eve with Yakko, Wakko & Dot • "Noel" • "The Christmas Tree" • "The Banks of the Delaware River" • "Feather Christmas" • "Yule Be Sorry" • "Christmas in July" • Bah, Humduck! A Looney Tunes Christmas • "A Christmas Carol" • "Tis the Seasoning"
DC Comics	"Christmas With the Joker" • "Holiday Knights" • "Frozen Out" • "Comfort and Joy" • "Storybook Holiday" • "Invasion of the Secret Santas!" • "Second Christmas" • "The True Meaning of Christmas" • "Teen Titans Save Christmas"
Hanna-Barbera co-productions	"A Dickens of a Christmas" • A Scooby-Doo! Christmas • "Ho Ho Horrors" • Tom and Jerry: A Nutcracker Tale • Scooby-Doo! Haunted Holidays • Tom and Jerry: Santa's Little Helpers • "The Plight Before Christmas" • "Scary Christmas" • "Scroogey Doo" • "It's a Wacky Life" • "Dashing Thru the Snow"
Other cartoons	"Yuletide and Redtide" • A Cool Like That Christmas • "Santa Mask" • The Polar Express • "The Match Before Xmas" • A Miser Brothers' Christmas • "Da Grinchy Code / Duck" • "FROST / Undercover Claus" • "Fantastic Four Christmases / Red and White Collar" • Elf: Buddy's Musical Christmas • "Top of the Naughty List"

Albums
Have Yourself a Looney Tunes Christmas • A Hip-Hopera Christmas • Merry Christmas: Animaniacs & Looney Tunes • The Looney Tunes Kwazy Christmas • A Looney Tunes Sing-A-Long Christmas

FANDOM

Synopsis

Availability