Big Bang Theory Universe

The comedy of scientists going about their lives, plenty of choices there.

What if Leonard was more assertive with Penny early on?

What if Kurt was more dominant with Penny during the Halloween Party of Season 1?

What if Bernadette was into Howard being a perv?

What if the meds from Season 1, episode 15 worked permanently for Raj and he got Missy?

What if Penny never learned that Dave Underhill was married?

What if when Penny and Raj got drunk they actually had slept together?

What if Raj was able to talk to girls sooner?

What if Raj managed to keep Lalita's attention on their date?

What if Lalita was able to get Sheldon into bed?

What if Leonard didn't mind Stephanie's clinginess?

What if Leonard fully cheated on Priya or Priya never cheated on him?

And there's even more options and possibilities.