"You Scratch My Back", the fifth installment in the The New Batman Adventures series, not only marks the entrance of the newly styled Catwoman (and Selina Kyle, who is now a brunette), but also brings us Nightwing! The ever-astute Selina uses her feminine wiles to entangle the young and eager Mr. Grayson, but Batman and Batgirl are both not so sure about the veracity of her motives.