Harvey Birdman, Attorney at Law (2000)

S3E7 Evolutionary War

When Cavey Jr.'s school declines to teach evolution, Captain Caveman seeks out Harvey to advocate for the furry little boy's right to learn. Harvey's challenge is twofold: he must not only validate the theory of evolution but also clarify the presence of a talking caveboy. To make matters even more complicated, he faces an existential crisis triggered by Reducto, adding to the pressure of his task.