Socially challenged they remain, but the scientific geniuses of the show always deliver hilarious results. Leonard returns from his North Sea expedition to find that his relationship with Penny involves more beta-testing than he's ever done in a lab. Howard's attachment issues with the women in his life in particular and Raj's social breakthrough with women in general provide more laughs. Bernadette and Amy stand staunchly by the men in their lives, even when they're sitting in a marathon role-playing game.

Title from disc surface. Language options taken from DVD menu and may differ from container packaging. Originally broadcast on television by CBS during the 2013-2014 television season. Special features: Disc 1. String theory serenade ; 2013 Comic-Con panel ; Johnny Galecki crashes the BBT writers panel -- Disc 2. James Earl Jones : the un-conventional guest star ; BBTea time -- Disc 3. The Big Bang Theory's May the 4th ; The big Cendrowski : backstage with the coolest director and cast in the Universe ; Gag reel.

Disc 1.The Hofstadter insufficiency / director, Mark Cendrowski, writers, Eric Kaplan, Jim Reynolds, & Steve Holland ; The deception verification / director, Mark Cendrowski, writers, Steven Molaro, Steve Holland, & Maria Ferrari ; The scavenger vortex / director, Mark Cendrowski, writers, Steven Molaro, Jim Reynolds, & Maria Ferrari ; The raiders minimization / director, Mark Cendrowski, writers, Steven Molaro, Steve Holland, & Maria Ferrari ; The workplace proximity / director, Mark Cendrowski, writers, Chuck Lorre, Eric Kaplan & Jim Reynolds ; The romance resonance / director, Mark Cendrowski, writers, Steven Molaro, Steve Holland, & Maria Ferrari ; The Proton displacement / director, Mark Cendrowski, writers, Steven Molaro, Eric Kaplan, & Jim Reynolds ; The itchy brain simulation / director, Mark Cendrowski, writers, Eric Kaplan, Steve Holland, & Maria Ferrari -- Disc 2. The Thanksgiving decoupling / director, Mark Cendrowski, writers, Steven Molaro, Jim Reynolds, & Jeremy Howe ; The discovery dissipation / director, Mark Cendrowski, writers, Steven Molaro, Steve Holland, & Adam Faberman ; The Cooper extraction / director, Mark Cendrowski, writers, Jim Reynolds, Steve Holland, & Tara Hernandez ; The hesitation ramification / director, Mark Cendrowski, writers, Steven Molaro, Steve Holland, & Maria Ferrari ; The occupation recalibration / director, Mark Cendrowski, writers, Steven Molaro, Jim Reynolds, & Steve Holland ; The convention conundrum / director, Mark Cendrowski, writers, Steven Molaro, David Goetsch, & Steve Holland ; The locomotive manipulation / director, Mark Cendrowski, writers, Steven Molaro, Eric Kaplan, & Maria Ferrari ; The table polarization / director, Gay Linvill, writers, Chuck Lorre, Jim Reynolds, & Steve Holland -- Disc 3. The friendhship turbulence / director, Mark Cendrowski, writers, Jim Reynolds, Steve Holland, & Maria Ferrari ; The mommy observation / director, Mark Cendrowski, writers, Steven Molaro, Eric Kaplan, & Anthony Del Broccolo ; The indecision amalgamation / director, Anthony Joseph Rich, writers, Steven Molaro, David Goetsch, & Steve Holland ; The relationship diremption / director, Mark Cendrowski, writers, Chuck Lorre, Eric Kaplan & Steve Holland ; The anything can happen recurrence / director, Mark Cendrowski, writers, Jim Reynolds, Steve Holland, & Tara Hernandez ; The Proton transmogrification / director, Mark Cendrowski, writers, Steven Molaro, Eric Kaplan, & Steve Holland ; The gorilla dissolution / director, Peter Chakos, writers, Steven Molaro, Steve Holland, & Eric Kaplan ; The status quo combustion / director, Mark Cendrowski, writers, Steven Molaro, Steve Holland, & Tara Hernandez.