Release calendarTop 250 moviesMost popular moviesBrowse movies by genreTop box officeShowtimes & ticketsMovie newsIndia movie spotlight
    What's on TV & streamingTop 250 TV showsMost popular TV showsBrowse TV shows by genreTV news
    What to watchLatest trailersIMDb OriginalsIMDb PicksIMDb SpotlightFamily entertainment guideIMDb Podcasts
    OscarsEmmysToronto Int'l Film FestivalHispanic Heritage MonthIMDb Stars to WatchSTARmeter AwardsAwards CentralFestival CentralAll events
    Born todayMost popular celebsCelebrity news
    Help centerContributor zonePolls
For industry professionals
  • Language
  • Fully supported
  • English (United States)
    Partially supported
  • Français (Canada)
  • Français (France)
  • Deutsch (Deutschland)
  • हिंदी (भारत)
  • Italiano (Italia)
  • Português (Brasil)
  • Español (España)
  • Español (México)
Watchlist
Sign in
  • Fully supported
  • English (United States)
    Partially supported
  • Français (Canada)
  • Français (France)
  • Deutsch (Deutschland)
  • हिंदी (भारत)
  • Italiano (Italia)
  • Português (Brasil)
  • Español (España)
  • Español (México)
Use app
Back
  • Cast & crew
  • User reviews
  • Trivia
IMDbPro
Johnny Galecki, Simon Helberg, Jim Parsons, Kunal Nayyar, and Blake Anderson in The Big Bang Theory (2007)

Johnny Galecki: Leonard Hofstadter

The Line Substitution Solution

The Big Bang Theory

Johnny Galecki credited as playing...

Leonard Hofstadter

Photos3

View Poster
View Poster
View Poster

Quotes7

  • Penny Hofstadter: You really want me to pick up your mother all by myself?
  • Leonard Hofstadter: I just feel like it would be a good chance for you to bond.
  • Penny Hofstadter: Or a way for you to avoid her?
  • Leonard Hofstadter: I don't know what he is putting on those cards, but you are smarter than ever.
  • [first lines]
  • Penny Hofstadter: [Sheldon holds up a flash card] Helium.
  • Sheldon Cooper: Yes.
  • [Penny holds up a picture flash card]
  • Sheldon Cooper: Taylor Swift.
  • Penny Hofstadter: Yes.
  • [Sheldon holds up another card]
  • Penny Hofstadter: Pi.
  • Sheldon Cooper: Yes.
  • [Penny holds up another picture]
  • Sheldon Cooper: Kardashian.
  • Penny Hofstadter: More specific.
  • Sheldon Cooper: [after a pause] Khloé?
  • Penny Hofstadter: Yes!
  • Sheldon Cooper: Ah! See, I remember because if it looks like Kim, it's Kim; if it looks kinda like Kim, it's Kourtney; if it looks nothing like Kim, it's Khloé.
  • Penny Hofstadter: [Sheldon holds up another card] Oh, that's a venn diagram. And I remember because I thought to myself: 'Venn is he going to stop talking about this diagram?'
  • [Leonard enters]
  • Leonard Hofstadter: What are you guys doing?
  • Sheldon Cooper: Oh, well, we decided to use our breakfast time to expand our respective knowledge bases.
  • Leonard Hofstadter: Hnh. Let me try.
  • [Sheldon and Penny each hold up a card]
  • Leonard Hofstadter: Atom of hydrogen; Adam of Maroon 5; mike drop.
  • Sheldon Cooper: I'm sorry, who is Mike Drop?
  • Sheldon Cooper: Bad news. Amy's making me go shopping with her later, so... looks like none of us can go.
  • Leonard Hofstadter: You do realize we're allowed to have fun without you,
  • Howard Wolowitz: In fact, that's usually the trick to it.
  • Sheldon Cooper: You need to go to the end of the line.
  • Trevor: Uh, who made you line monitor?
  • Sheldon Cooper: Mrs. Wuntch in fourth grade. My slogan was "A line that's straight is a line that's great."
  • Trevor: [to Leonard] Is this guy for real?
  • Leonard Hofstadter: Boy, I wish I could say no.
  • Howard Wolowitz: [about Raj's stick chair] You look like you come with a kickstand.
  • Raj Koothrappali: You can't make me feel bad.
  • Howard Wolowitz: Maybe not. Leonard?
  • Leonard Hofstadter: So, when the aliens brought you back, they just left the probe in?
  • Howard Wolowitz: We've waited in a lot of lines together, haven't we?
  • Sheldon Cooper: Remember when we camped out for the Doctor Who panel at Comic-Con?
  • Raj Koothrappali: Yeah. Sleeping under the stars with other fans who love the show as much as we do.
  • Leonard Hofstadter: Waking up wondering which of those fans stole our wallets.
  • Leonard Hofstadter: Hey Penny, do you want to go to the airport with me later to pick up my mother?
  • Penny Hofstadter: Sure.
  • Leonard Hofstadter: Thanks.
  • Penny Hofstadter: No problem.
  • Leonard Hofstadter: Hey Penny, um, since you're already going to be at the airport, do I need to go?

More from this title

More to explore

Recently viewed

Please enable browser cookies to use this feature. Learn more.
Get the IMDb App
Sign in for more accessSign in for more access
Follow IMDb on social
Get the IMDb App
For Android and iOS
Get the IMDb App
  • Help
  • Site Index
  • IMDbPro
  • Box Office Mojo
  • License IMDb Data
  • Press Room
  • Advertising
  • Jobs
  • Conditions of Use
  • Privacy Policy
  • Your Ads Privacy Choices
IMDb, an Amazon company

© 1990-2025 by IMDb.com, Inc.