Batman Adventures #28 1994

Batman Adventures #28 presents 'Twelve Days of Madness,' a festive yet twisted tale. In this issue, an escaped Harley Quinn, disguised as a psychiatrist, conspires with an incarcerated Joker to hijack Arkham Asylum's Christmas pageant. They inject city councilmen with Joker Venom, leading to a chaotic performance of the 'Twelve Days of Christmas.' Batman intervenes to thwart their madcap scheme. This issue is notable for collectors as an early and significant appearance of Harley Quinn within the Batman Adventures comic series.