A whiteboard full of equations is shown
Comic book store
Amy talks about her work with monkeys
Video games
Sheldon sits in “his spot”
Howard mentions his mom
Sheldon knocks three times before entering
Soft Kitty
Penny says ?Oh, sweetie?
Elevator mention
Dungeons & Dragons
Raj talks about Cinnamon
FREE
Sheldon corrects someone’s grammar or fact
Bazinga!
Bernadette’s high-pitched voice comment
Howard tries to flirt awkwardly
Roommate agreement
Leonard adjusts his glasses
Cheesecake Factory
Raj struggles to talk to women
superhero t-shirt
Nobel Prize is mentioned
Penny misunderstands a scientific concept
Star Trek reference