“The Big Bang Theory” has been on TV for nine seasons, but there’s still one character we have left to meet. Simon Helberg, who plays Howard Wolowitz on the show, says he wants to see Howard’s estranged dad on the show one day.

Howard’s father, Sam Wolowitz, left him and his mother when he was apparently just 11 years old.

“I think it would be nice to potentially meet his dad,” Helberg said in an interview with the Press Association. “I don’t write the show, I don’t create any of those aspects so I get a script, open it and find out his dad abandoned him. It’s interesting. I can’t wait to see what they’ve got for us.”

Fans have developed theories for years about Howard’s father and whether or not he will ever appear on “Big Bang.”

A few clips from the show talk about Howard’s dad in a roundabout way, never really revealing a ton of details:

Be sure to catch “The Big Bang Theory” Mondays at 8 p.m. ET on CBS.

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