What was the first prime time animated (cartoon) series on American television?

ChewyGazelle68623, mighty mouse wasn't on primetime.

I remember the big contest to name Fred and Wilma Flintstones baby girl. The winning name: Pebbles. Can’t remember the exact year but it was 1963 or before.

Player #4402762, I doubt you did so during prime time.

I watched Mighty Mouse on tv in the 40’s

you are wrong

Micheswa75, Johnny quest

What's number one?