The comic Batman, by DC Comics, is mentioned several times in Buffy.

• In Some Assembly Required, Buffy says to Willow, “Sorry to interrupt, Willow, but it’s the Bat-Signal.” She’s alluding to the ‘Bat-Signal’ in Gotham city which is used to alert Batman that he is needed.
• In Halloween, Xander says to Cordelia, “Catwoman, you’re with me.” In the Batman comics, Catwoman is a cat-burglar, and the alter ego of Selina Kyle.
• In The Yoko Factor, Xander says, “You and Willow go do the superpower thing, I’ll stay behind and putt around the Batcave with crusty old Alfred here.” The Batcave was Batman’s high-tech base and Alfred was his loyal butler.
• The nerds’ freeze ray gun in Smashed may have been inspired by Batman’s Mr Freeze, who used a similar device.
• In Beneath You, Spike says, “A little touchy-feely, and you’re off to the Batpoles?” He’s referring to the 1960s TV show Batman in which Batman and Robin would slide down poles to the Batcave when they were needed.
• In Bring on the Night, Andrew mentions Batman’s foe The Riddler.
• Vincent Schiavelli, who played Jenny’s uncle in Surprise and Innocence played the Organ Grinder in the movie Batman Returns.
• In the Angel episode Lonely Hearts, Doyle says, “It’s not like you have a signal folks can shine in the sky whenever they need help, you know?”, referring to the Batsignal.
• In ‘In the Dark‘, Spike says of Angel, “quickly to the Angelmobile, away” - another Batman reference.
• In Benediction, Lilah says of Connor,”Who’s the boy wonder?” This is the name often given to Batman’s sidekick, Robin.