The Big Bang Theory backdrop
The Big Bang Theory S4E9 — The Boyfriend Complexity
8.4
The Big Bang Theory•Season 4•Episode 9

The Boyfriend Complexity

8.4/10 · 4,833 votesNov 18, 201021 min

Ranked #4 of 24 in Season 4•+0.4 vs season avg

Discussion

Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.

Directed byMark Cendrowski
Previous episodeE8 · The 21-Second ExcitationNext episodeE10 · The Alien Parasite Hypothesis
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons12

All123456789101112

Season 4 Episodes24

The Robotic Manipulation stillE1 8.7

The Robotic Manipulation

The Cruciferous Vegetable Amplification stillE2 8.3

The Cruciferous Vegetable Amplification

The Zazzy Substitution stillE3 7.9

The Zazzy Substitution

The Hot Troll Deviation stillE4 8.0

The Hot Troll Deviation

The Desperation Emanation stillE5 7.6

The Desperation Emanation

The Irish Pub Formulation stillE6 8.0

The Irish Pub Formulation

The Apology Insufficiency stillE7 8.0

The Apology Insufficiency

The 21-Second Excitation stillE8 8.1

The 21-Second Excitation

The Boyfriend Complexity stillE9 8.4Now viewing

The Boyfriend Complexity

The Alien Parasite Hypothesis stillE10 7.6

The Alien Parasite Hypothesis

The Justice League Recombination stillE11 8.6

The Justice League Recombination

The Bus Pants Utilization stillE12 7.5

The Bus Pants Utilization

The Love Car Displacement stillE13 8.2

The Love Car Displacement

The Thespian Catalyst stillE14 7.7

The Thespian Catalyst

The Benefactor Factor stillE15 7.7

The Benefactor Factor

The Cohabitation Formulation stillE16 7.8

The Cohabitation Formulation

The Toast Derivation stillE17 7.9

The Toast Derivation

The Prestidigitation Approximation stillE18 8.1

The Prestidigitation Approximation

The Zarnecki Incursion stillE19 8.0

The Zarnecki Incursion

The Herb Garden Germination stillE20 8.2

The Herb Garden Germination

The Agreement Dissection stillE21 8.2

The Agreement Dissection

The Wildebeest Implementation stillE22 7.7

The Wildebeest Implementation

The Engagement Reaction stillE23 8.1

The Engagement Reaction

The Roommate Transmogrification stillE24 8.5

The Roommate Transmogrification

Cast7

Johnny Galecki

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Kaley Cuoco

Penny

Simon Helberg

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Mayim Bialik

Amy Farrah Fowler

Crew8

Chuck Lorre

Chuck Lorre

Story

Steven Molaro

Steven Molaro

Co-Executive Producer

Steven Molaro

Steven Molaro

Teleplay

Bill Prady

Bill Prady

Teleplay

Mark Cendrowski

Mark Cendrowski

Director

David Goetsch

David Goetsch

Teleplay

Jim Reynolds

Jim Reynolds

Story

Lee Aronsohn

Lee Aronsohn

Story

Discussion

0 comments

Join the conversation

Share your take and reply to other fans.

No comments yet

Be the first to share your thoughts on this episode.

Episode Summary

"The Boyfriend Complexity" is episode 9 of The Big Bang Theory season 4. It scored 8.4/10 from 4,833 votes, ranking #4 of 24 episodes this season (season average 8.0). Directed by Mark Cendrowski, it aired on November 18, 2010.

Next: E10 · The Alien Parasite HypothesisBest of Season 4