Season 4, Episode 1 - "A Matter of Family"
After a young circus performer named Dick Grayson loses his parents to a criminal named Tony Zucco, Bruce adopts the young boy, since he knows what it feels like to lose your parents. Batman then sets out to bring Mr. and Ms. Grayson's killer to justice. Once Bruce's secret is revealed, Dick joins Batman as his new sidekick, Robin. Together, they set out to find Zucco and bring him to justice.
