Hollyrock-a-Bye Baby is a television film based on The Flintstones. It first aired in 1993 and is the sequel to I Yabba-Dabba Doo! In this movie, the Flintstones and the Rubbles go to the city of Hollyrock to visit Pebbles and Bamm-Bamm, who are now married and getting ready to have a baby.