7
/10
Zack Johnson is a fictional character portrayed by Brian Thomas Smith in the TV series The Big Bang Theory.
In the first episode they appeared in, titled The Lunar Excitation (season 3), they were 33 years old.
They appear in 11 episodes out of a total of 279 aired

Zack Johnson

by Brian Thomas Smith

character

Episodes11

  • 8.6
    /10

    The Lunar Excitation
    episode S3.E23 may 2010
    Penny has a night of angry, drunken sex with Leonard, much to his confusion. Meanwhile, Howard and Raj search for Sheldon's perfect match online.
  • 7.6
    /10

    The Alien Parasite Hypothesis
    episode S4.E10 december 2010
    Amy finds she has sexual feelings for Penny's ex-boyfriend Zack, while Raj and Howard try to prove who would be the better superhero.
  • 8.6
    /10

    The Justice League Recombination
    episode S4.E11 december 2010
    The guys enter a costume contest as members of the Justice League and convince Penny and Zack to join them.
  • 7.9
    /10

    The Toast Derivation
    episode S4.E17 february 2011
    Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
  • 8.8
    /10

    The Thanksgiving Decoupling
    episode S7.E9 november 2013
    The gang spend Thanksgiving at Mrs. Wolowitz's house. Howard tries to bond with his father-in-law, and a mistake from Penny's past comes back to haunt her.
  • 8.1
    /10

    The Cooper Extraction
    episode S7.E11 december 2013
    While Sheldon is at home in Texas, the rest of the gang decorate for Christmas and think about how much he has affected their lives.
  • 7.4
    /10

    The Fermentation Bifurcation
    episode S9.E22 april 2016
    Sheldon and Bernadette spend the evening together while the rest of the gang go to a wine tasting party, but things get uncomfortable for Raj when Penny's ex-boyfriend Zack shows up and takes an interest in Claire.
  • 6.8
    /10

    The Cognition Regeneration
    episode S10.E22 april 2017
    Leonard is less than thrilled when Penny considers accepting a job offer from her ex-boyfriend, Zack. Sheldon worries that he hasn't reached his full potential soon enough.
  • 7.7
    /10

    The Bitcoin Entanglement
    episode S11.E9 november 2017
    Sheldon tries to teach the other guys a lesson after they cut him out of a potentially valuable Bitcoin investment seven years ago.
  • 7.1
    /10

    The Propagation Proposition
    episode S12.E12 january 2019
    Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help; Koothrappali attempts to mend things with his ex-fiancee Anu.
  • 7.4
    /10

    The Donation Oscillation
    episode S12.E15 february 2019
    Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend; Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip aboard the "vomit comet."