In which season of the American animated sitcom "The Flintstones" is Pebbles born?

Pebbles Flintstone (also known as Pebbles Flintstone-Rubble as an adult) is a fictional character in the 'Flintstones' franchise. The red-haired daughter of Fred and Wilma Flintstone, Pebbles is born near the end of the third season. She is most famous in her infant form on "The Flintstones".

By the time she was a teenager, Pebbles was noted for getting Bamm-Bamm and their friends into various misadventures, mostly due to sharing her dad's penchant for schemes that would inevitably backfire (such as causing a strike by Bedrock's city employees when she was elected honorary mayor for a week). She and her friends attended Bedrock High School; Pebbles had a catchphrase similar to her father's: "Yabba-Dabba-Doozie!"

Pebbles has also appeared at various other ages, including as a teenager on the early 1970s spin-off "The Pebbles and Bamm-Bamm Show" and as an adult in three made-for-television movies. She spent most of her time with Bamm-Bamm Rubble, her childhood best friend whom she eventually marries.