The producers hired Danny Tamberelli, Christy Knowings and Leon Frierson. Others treat it as a human classification of knowings that work instrumentally. These "sudden knowings" would subsequently prove to be true. Leon Frierson and Christy Knowings did not have Best Of specials. Christy Knowings left show business on her own terms. Chris is played by Chris Knowings, and is the nephew of Gordon and Susan. She made three episode appearances on "Sesame Street", alongside her real-life twin brother Chris Knowings. Knowings herself was a panelist a few times on "Figure It Out". Knowings remained on the show until the end of Season 6 in 2000. Knowings was born on February 25, 1980 in the Bronx, New York City. Knowings made a small cameo in the green room for the show's 10th Anniversary Special.