A new Young Sheldon season 5 promo spot reveals The Big Bang Theory's Howard Wolowitz cameo. Played by Simon Helberg for 12 seasons in the CBS nerd-centric sitcom, the character was known for his cocky attitude and odd sense of humor, not to mention his borderline inappropriate relationship with his mother. While Sheldon (Jim Parsons) loved poking fun at all of his friends, he always zeroed in on Howard as he isn't a physicist and doesn't have a Ph.D. like the rest of his male pals.
Sheldon's
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