Fifty years ago today, the Flintstones had a milestone(No pun intended) with the birth of Pebbles.
The story arc began with the episode "The Surprise," in which Wilma told Fred she was pregnant. This delighted him, but he was unprepared for what lay ahead. In subsequent episodes, he was fired and rehired, had a run-in with his mother-in-law, not for the first or last time, and was even threatened by a bank-robbing granny!
Finally, the big day arrived. After a series of complications, little Pebbles was born. Of course, this happened offscreen, as animation wasn't quite ready to show the gory details of childbirth. From that moment on, Pebbly-poo was featured in many episodes either by herself, or with Bamm-Bamm, who arrived later.
Over time, she was seen as a teenager, a toddler, and a ten-year old. In the '90's, she finally married Bamm-Bamm, and they had kids of their own.
Happy 50th, Pebbles!