There's a Musical Episode starring Neil Patrick Harris, a crossover with .
The show is notable for having the first animated appearance of the Blue Beetle, specifically the third Blue Beetle Jaime Reyes (though Dan Garrett and Ted Kord also make posthumous appearances).
The show's first season was originally supposed to run for 13 episodes before a break, but it was so well received that the break until the next episode aired was shortened to a single week, extending the first season well past its original run.
After three excellent seasons, the creators decided to wrap up the show. Bat-Mite: Batman's rich history allows him to be interpreted in a multitude of ways.
It also marks the first television appearance of the original Flash, Jay Garrick, as well as the Jack Kirby creations .
And when A-lister Superman finally appears in season three, his character-centric episode consists of half an hour of nods to Superdickery.
"Batman's rich history allows him to be interpreted in a multitude of ways.