The Big Bang Theory might have been filled with all things science, but at its heart it was really about relationships.
One relationship that we all became invested in was roommates Sheldon Cooper and Leonard Hofstadter. Often Leonard found himself being bossed around by Sheldon, such as the pair having a bathroom schedule and Hofstadter never being allowed to change the thermostat.
Still, despite often having his home life controlled by Sheldon, Leonard is deep down quite happy to help his roomie. Leonard is there for Sheldon whenever he needs him, and though Cooper might not always express his gratitude, he knows that Leonard is a loyal and kind best friend.
This pair might often find themselves arguing, but ultimately neither would have their friendship any other way.
So, how much do you know about Sheldon and Leonard? We've created a quiz that will test even the biggest fans of these Big Bang Theory roommates. All you need to do is decide if it was Leonard or Sheldon who said each of the following quotes.
Do you remember who said that they were "King of the nerds"? Can you recall who described the suggestion of experiencing feelings as like being "a hippie at a love-in"?
Will you prove yourself the ultimate geek when it comes to Leonard and Sheldon? Let's find out if you have what it takes to get 100% correct!
Answers at the end!