Charles "Chuck" Pearson is the father of Pepper Ann and Moose Pearson and the ex-husband of Lydia Pearson and a minor character in Pepper Ann.
He is seen only in a few episodes in his entirety ("Thanksgiving Dad", "That's My Dad " and "Guess Who's Coming to the Theater", most notably). We know, however, that he is a blimp pilot for "Nice Week".
He and Lydia got divorced four years prior to the events of the series, though still remain on good terms (though it's implied that Chuck and Lydia divorced because Lydia didn't like how Chuck was always working instead of being a father). However, Lydia does oscillate between trying to impress him and trying to avoid him whenever he visits. According to the episode, "Cold Feet", Lydia first fell in love with Chuck when she nearly yelled at him for interrupting her conversation with her mom about the future of the Rialto theater. Her sister, Janie, also had eyes for him, but pushed Janie out of the way after Janie reminded Lydia that she'd rather advertise on a beached whale instead of a blimp.
For the first and second seasons, it was a bit of a running gag that his face was never seen. This changes in later episodes, with "That's My Dad" being the first time his entire face is shown.