The Big Bang Theory

Zack Johnson

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Zack Johnson
Vice President of his father's Menu Designing Company
Series Information
First episode
The Lunar Excitation
S1 S2 S3 S4 S5 S6 S7 S8
Portrayed by

Zack Johnson [1] is an on-and-off boyfriend of Penny's who first appeared in "The Lunar Excitation" (S03E23). He and Penny once got married on a whim while in Las Vegas; Penny was unaware it was a real wedding and ended up having it annulled later. Though usually a friendly, outgoing person, Zack is extremely dimwitted and displays even less understanding of sarcasm than Sheldon does. Despite his stupidity, he is quite interested in science.

He is a literary foil, juxtaposed to Leonard, and perhaps to a lesser degree Kurt, Penny's 'jock douche-bag' ex-boyfriend. Zack is always friendly, non-aggressive, and arguably even less intelligent than Kurt. He is in between Leonard and Kurt in all perceivable aspects; he has a fairly remedial and unremarkable career (unlike Leonard), but has no mentioned criminal record (unlike Kurt). Zack also appears to be weaker than Kurt, but the same height as Kurt as well as tougher than an average person. He is presented as moderately attractive.

Character InformationEdit

Zack is the Vice President of the company that designs the Cheesecake Factory's menus (as well as other restaurant's menus) which is how he met Penny. In "The Lunar Excitation" (S03E23), he goes on a date with Penny who, allegedly due to having dated Leonard, finds his stupidity insufferable and winds up having a drunken sexual encounter with Leonard on the same night.

Zack makes a second appearance in "The Alien Parasite Hypothesis" (S04E10). He briefly meets Amy Farrah Fowler, who instantly feels sexually attracted towards him. She later approaches him at a bar hoping for sexual intercourse with him, but his stupidity becomes too much of a turnoff for her to go through with it. When they shake hands, Amy whimpers, saying that "should hold [her] over" for a while. Then, Amy says "Hoo".

Penny gets back together with Zack again in "The Justice League Recombination" (S04E11), later admitting to Leonard that she only did so in order not to be alone on New Year's Eve. In this episode Zack attempts to befriend Leonard, Sheldon, Raj and Howard. He dresses up as Superman for Stuart's New Year's party, helping them complete their Justice League theme and win the contest for best group costume. He and Penny apparently broke up again sometime afterwards.

TBBT 417

Stuart, Kripke and Zack singing "Walking On Sunshine".

Zack appears again in "The Toast Derivation" (S04E17), having been invited to Sheldon and Leonard's apartment by Sheldon. This gathering is Sheldon's attempt to establish a new social group, along with Kripke, Stuart, and hopefully LeVar Burton, after Sheldon got angry because he was not the center of his previous social group. At the social event, Zack impresses Stuart and Kripke with his tale of a naked woman in a hot tub, and later the three end up singing karaoke, much to Sheldon's dismay.

In "The Thanksgiving Decoupling" (S07E09), Penny mentions the fake wedding ceremony she and Zack went through on a Thanksgiving trip to Las Vegas three years ago. Leonard explains that those wedding chapels are real and that Penny is legally married to Zack, who also thought the ceremonies were fake. Penny realizes that she is married and is Mrs. Zack Johnson. While dinner is being prepared, Penny has annulment papers downloaded, fills them out and calls Zack over to sign them. Dense as ever, Zack wonders if he should do it to their kids. Penny reminds him that they have no children and he asks if she's sure about that, since she didn't even know she was really married to him. He signs it and they all sit down to a Thanksgiving dinner.

In "The Cooper Extraction" (S07E11), Leonard makes up a story about what if Penny would have ended up with Zack. Leonard imagines that Zack would use the money for rent to buy magic beans, and then Zack and Penny would both pee their pants.

The return of Zack Johnson.



  1. Full name first revealed by Sheldon in The Alien Parasite Hypothesis (S04E10)


  • Watching the guys laser experiment.
  • Are you going to blow up the moon?
  • The guys meet Zack.
  • Cool! 3D!
  • They wish they were kissing each other.
  • The Justice League of America.
  • Justice League of America.
  • You used to date Penny?
  • Penny as Wonder Woman.
  • Watching a car jacking.
  • We won!
  • Amy's arranged date with Zack.
  • Milk Dud?
  • Karaoke!
  • Zack as Superman.
  • The return of Zack.
  • Penny getting him to sign the annulment papers.
  • Zack and Penny in Leonard's imagination if he never met Penny. Zack uses the rent money to buy magic beans.
v · e · d
Characters, Cast & Crew
Characters Main Leonard Hofstadter  ‧  Sheldon Cooper  ‧  Penny Hofstadter  ‧  Howard Wolowitz  ‧  Rajesh Koothrappali  ‧  Amy Farrah Fowler  ‧ 
Bernadette Rostenkowski-Wolowitz  ‧  Stuart Bloom  ‧  Emily Sweeney  ‧  Leslie Winkle    The Social Group
Recurring Debbie Wolowitz  ‧  Barry Kripke  ‧  Priya Koothrappali  ‧  Dr. V. M. Koothrappali  ‧  Mrs. Koothrappali  ‧  Lucy  ‧  Mary Cooper  ‧  Zack Johnson  ‧  Beverly Hofstadter  ‧  Mike Rostenkowski  ‧  Alex Jensen  ‧  Professor Proton  ‧  Althea  ‧  Cinnamon
Cast Regulars Johnny Galecki  ‧  Jim Parsons  ‧  Kaley Cuoco  ‧  Simon Helberg  ‧  Kunal Nayyar  ‧  Mayim Bialik  ‧  Melissa Rauch  ‧  Kevin Sussman  ‧ 
Laura Spencer  ‧  Sara Gilbert
As Selves Wil Wheaton  ‧  Mike Massimino  ‧  Stephen Hawking  ‧  Katee Sackhoff  ‧ Steve Wozniak  ‧ Buzz Aldrin  ‧ Summer Glau  ‧ James Earl Jones  ‧ Carrie Fisher  ‧ Brent Spiner  ‧ Bill Nye  ‧ George Smoot  ‧ George Takei  ‧ LeVar Burton  ‧ Neil deGrasse Tyson  ‧ Brian Greene  ‧ Charlie Sheen  ‧ Stan Lee
Crew Writers Chuck Lorre * (Creator)  ‧  Bill Prady * (Creator)  ‧  Steven Molaro *  ‧  Steve Holland *  ‧  Maria Ferrari *  ‧  Jim Reynolds *  ‧  Eric Kaplan *  ‧  Anthony Del Broccolo  ‧  Lee Aronsohn *  ‧  Dave Goetsch *  ‧  Tara Hernandez  ‧  Richard Rosenstock *
Directors Mark Cendrowski  ‧  Peter Chakos * (mainly as Editor)  ‧  Anthony Rich  ‧  James Burrows
Science consultant : David Saltzberg Director of photography : Steven V. Silver
Costume designer : Mary T. Quigley * Unit production manager : Kelly-Anne Lee *
Theme composer / performer : Barenaked Ladies Chuck Lorre Productions
also as Producer The Big Bang Theory : Full cast & crew on IMDb

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