| Trivia | Answer | Episode Name |
| What does Howard slip into Sheldon's warm milk without him knowing? | |
| Which two scientific theories do Leslie and Leonard argue over? | |
| Which online game does Penny become addicted to after Sheldon introduces her to it? | |
| What animal does Sheldon wish for, saying it would be his perfect pet? | |
| Which avenue does Sheldon wish to avoid on his way to work? | |
| What is the name of the controlling graduate student that takes over Sheldon's life? | |
| Which TV program does Penny watch in the guys' apartment when her cable gets cut? | |
| What is Sheldon's Kryptonite? | |
| What two further options does Sheldon add to the game 'Rock paper scissors?' | |
| What is in the jar that Sheldon pretends he cannot open in an attempt to boost Leonard's masculinity standing? | |
| When Dr Stephanie Barnett tells Sheldon he has swollen vocal chords and must stop talking, what name does she give to the procedure? | |
| What does Penny give Sheldon for Christmas? | |