7th Heaven Season 6 Episode 7 Prodigal ( Air Date 2001-11-12 ) Genre Family, Drama, Comedy category. Overview "Mary's sudden arrival has everyone in the family wondering what happened between her and Wilson. Only Mary knows and she's not telling. Her presence delights Annie, who goes out of her way to make her daughter comfortable, even offering her the converted garage apartment. But not everyone is happy to see her. Ruthie feels that Mary owes everyone an apology for the actions that led to her moving away.".