| Hint | Answer |
| During the theme song, what is the first century to show up on the timeline that scrolls across the bottom of the screen? | |
| What do the tissue boxes in apartment 4A resemble? | |
| What does the white sign with red lettering hanging on the wall opposite the table that is used for folding clothes in the laundry room say? | |
| What kind of pin does Howard always wear on his collar? | |
| The blue t-shirt that the silver mannequin in the corner of the comic book store sometimes wears says what? | |
| What kind of computer/lap top does sheldon have? Please don't say a red one. | |
| What kind of fruit can always be seen in apartment 4A's kitchen? | |