Sins of the Mother

S1 E5: Along with Barbara and Helena, Dinah learns the truth about her past when her mother, Carolyn Lance (Lori Loughlin - "Full House"), comes to New Gotham in search of the daughter she abandoned years before. Dinah is shocked to learn that Carolyn was once Batman's protégé, Black Canary. Meanwhile, Helena finds out that Reese has family problems of his own when he becomes secretive about a ruthless gangster.