The season opens with a two-hour movie entitled "Brotherly Love" and the birth of Virgil and Althea's twins. While Althea is waiting to go into labor, Tibbs' friend and ex-colleague from the Philadelphia P.D. is found dead, and it's at first labeled as a suicide. Tibbs heads up to the big city to attend his funeral, only to learn his friend's death was not by his own hand, but murder. Tibbs soon recognizes there is corruption going on within the police department, and his friend was framed for the murder of a drug dealer. In the process of trying to clear his friend's name, he first becomes a target, then framed for murder himself. Chief Gillespie travels to Philly to get Virgil out of jail, help him solve the mystery of what happened to his friend and seek justice for him, expose the corrupt officers and make it back home to Sparta in time for the twins' birth. William and Sarah Tibbs were welcomed into the world on September 18, 1990.