The guys enter a costume contest as members of the Justice League and convince Penny and Zack to join them.



(created by), (created by) | 6 more credits »

Watch Now

From $1.99 (SD) on Amazon Video



Episode cast overview:


Penny starts dating Zack again. Used to being the target of bullying, Leonard, Sheldon, Howard and Raj instead bully Zack through their implications to him that he's stupid. Not fully realizing what they're doing until Penny points it out to them, the guys decide to apologize to Zack in the only way they can. Accepting their apology, Zack decides to start hanging out with them, much to Penny's chagrin. This hanging out leads to the idea that Zack should replace Leonard as Superman in their group Justice League of America costume for the New Year's Eve party at the comic book store, with Penny the sixth wheel as Wonder Woman. These actions lead to questions from Leonard to Penny about why she's back together with Zack. Written by Huggo

Plot Summary | Plot Synopsis


Comedy | Romance


See all certifications »




Release Date:

16 December 2010 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

16:9 HD
See  »

Did You Know?


In Sheldon's incredibly short trip to the Grand Canyon at the end, the music accompanying him is the interlude "Flight of the Bumblebee" from the opera "The Tale of Tsar Saltan" by Nikolai Rimsky-Korsakov. See more »


Sheldon incorrectly states that although Amazon's tend to be very beefy gals they are not blonde. In reality there are several blonde Amazons. As an avid comic book reader Sheldon should know this. See more »


[first lines]
Raj Koothrappali: [playing a card] Water Demon.
Howard Wolowitz: [playing a card] Ice Dragon.
Leonard Hofstadter: [playing a card] Lesser Warlord of Ka'a.
Sheldon Cooper: Not so fast.
[playing a card]
Sheldon Cooper: Infinite Sheldon.
Leonard Hofstadter: Infinite Sheldon?
Sheldon Cooper: Yes. Infinite Sheldon, it beats all other cards - and does not violate the rule against homemade cards because I made it at work.
Leonard Hofstadter: You understand why people don't want to play with you?
See more »


References Justice League (2001) See more »


The Big Bang Theory Theme (Instrumental)
Composed and Performed by Barenaked Ladies
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Big Bang Hilarity
1 January 2015 | by (United States) – See all my reviews

The guys meet Penny's ex, now once-again boyfriend, Zack who they make a fool of for the most part without him knowing. He eventually catches on and realizes that they are calling him stupid and leaves with hurt feelings. They make it up to him, by giving him his favorite treat, and taking him to the comic book store where they then invite him to the New Year's Eve costume party to be part of their Justice League team dressed as Superman. He agrees, but Penny takes coaxing from all of them. The episode is packed with laughter, hilarity and an excellent guest performance by Brian Smith (as Zack). It is full of joy yet has an underlying sadness because of Penny's feelings that she still has for Leonard that she is hiding and trying to suppress. It then ends with a hysterical clip of Sheldon taking out his frustration at the Grand Canyon as his alternative persona The Flash.

0 of 0 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
Favourite to least favourite characters after 9 and a half seasons bhawesh-bhimani
ZZZZZZZZZzzzzzz vscpat
Do any of them actually read books? terrybabe
Another spreading wings story! Haha shangra86
The Space Station NightRavyn
Sheldon's apartment zodiac_zxc
Discuss The Justice League Recombination (2010) on the IMDb message boards »

Contribute to This Page