Ring Around the Riddler

1 Enter Batgirl, Exit Penguin 2 Ring Around the Riddler 3 The Wail of the Siren 4 The Sport of Penguins 5 A Horse of Another Color 6 The Unkindest Tut of All 7 Louie the Lilac 8 The Ogg and I 9 How to Hatch a Dinosaur 10 Surf's Up! Joker's Under! 11 The Londinium Larcenies 12 The Foggiest Notion 13 The Bloody Tower 14 Catwoman's Dressed to Kill 15 The Ogg Couple 16 The Funny Feline Felonies 17 The Joke's on Catwoman 18 Louie's Lethal Lilac Time 19 Nora Clavicle and the Ladies' Crime Club 20 Penguin's Clean Sweep 21 The Great Escape 22 The Great Train Robbery 23 I'll Be a Mummy's Uncle 24 The Joker's Flying Saucer 25 The Entrancing Dr. Cassandra 26 Minerva, Mayhem and Millionaires