Smart Guy is an American sitcom centering on the exploits of child genius T.J. Henderson (Tahj Mowry), who moves from being an elementary school student in the fourth grade to a high school student in the tenth grade, attending the same school as his two elder siblings Yvette and Marcus. Created by Danny Kallis, the series ran for three seasons on The WB from April 2, 1997 to May 16, 1999.