The Big Bang Theory story arc has several under lying questions: Will Penny and Leonard marry? Will Raj ever find a girl to love him, aside from his Yorkie, Cinnamon? Will Sheldon and Amy ever consummate their relationship?
A foundational question is, who is Howard Wolowitz’s father?
I think my daughter came up with the answer:
Cousin Eddie of National Lampoon’s Christmas Vacation. They even dress alike.
Consider and discuss.