Three years after the original feature film musical with Rex Harrison, Doctor Doolittle moved to television, adapted by DePatie-Freleng for NBC. This time, the good doctor is traveling by boat all around the globe, pursued by pirate Sam Scurvy (Lennie Weinrib, who was also a writer-producer on this show, and contributed to the theme song). who covets the secret of Doolittle's uncanny ability to communicate with animals for his own agenda.
Honestly, I can't see how talking to animals can enable anyone to rule the world. Anyway, here's a sample of the episode, "The Grasshoppers Are Coming, Hooray, Hooray!", uploaded by TheManFromUNCLEIllya to YouTube:
Doolittle, sadly, lasted just 1 season, and I'm assuming 20th Century Fox, which made the movie, also holds the rights to this show, which means it's highly unlikely you'll see this on DVD any time soon.