Further information: Batman Beyond, List of Batman Beyond episodes, and List of Batman Beyond characters
Running from 1999 through 2001, Batman Beyond was a spin-off of the other DC animated universe Batman shows set 20 years in the future. Over its run, 52 original episodes aired featuring a handful of characters carried forward from the previous shows. Most of the characters that rounded out the shows were created specifically for the show either wholly or as "20 year later" reinterpretations of then current DC Comics characters.
Read more about this topic: List Of DC Animated Universe Characters