The Big Bang Theory: 10 Questions That Must Be Answered Before The End
3. Who Is Howard's Father?
Throughout the series, the audience got to hear, if not meet, Howard's mother. Unfortunately, Howard grew up without a father and he, as well as the audience, do not know who or where he is.
The series touched on this a couple of times through the seasons and even found a letter in a closet, but Howard never proceeded to find out anything about his father. He loved his mother who raised him and didn't feel the need to bring his absentee father into his life.
That's all well and good for Howard, but the audience wants to know who his dad is and what he's been doing his whole life! That natural feeling or need to know is all over the Internet in discussion groups about this very subject where people constantly ask, who is Howard's dad???
The show might go ahead and answer the question of who Howard's father is and it might not. It wouldn't be the worst thing in the world if the series concluded with this question unanswered, but it would also be satisfying to find out the answer as well.