 Blank continued working for Warner Brothers, but also began providing voices for television cartoons produced by Hanna-Barbera. His most famous role during this time was Barney Rubble from the Flintstones. Oh, boy, wait till Fred sees my new bowling ball. It'll bring my score up to at least 100. And, of course, he was Mr. Spacely in the Jetsons. Send up Jetson, Miss Gamma. Yes, sir. Ready, Mr. Jetson? Right. Well, good luck.