Wooly steals Pebbles' birthday present that she bought for Wilma and buries it in the backyard, leaving her in a panic. Pebbles wrongfully blames her neighbor, Creepella Gruesome for the crime, which also disrupts a family reunion that the Gruesomes are throwing.
Next door neighbor, Creepella Gruesome visits and, when she leaves, Pebbles notices that her hidden birthday gift for her mother, Wilma is also gone. Not knowing that her pet Wooly has buried the gift in the back yard, Pebbles and the kids volunteer to babysit little Gobby Gruesome and his pet spider, Schneider so they can search the mansion.
They can’t find it so they head to the Gruesome family reunion at the Marina Del Rock in disguise, after leaving Gobby with Wilma and Betty. Fred and Barney see the kids on the way home from bowling, worry that the Gruesomes have turned them into “creeps” and follow.
Bamm-Bamm’s disguise happens to be the same as that of a wanted peeping-Tom named the Creepasaurus. He scares some other boat owners and they call the police. Fred and Barney get trapped in a runaway boat, Bamm-Bamm and Moonrock go after them, the police follow them, and the girls pursue. Finally, they all collide. The police can’t understand what’s going on so they take everyone downtown where Pebbles explains everything to a judge.
Wilma and Betty arrive with Gobby and Wilma has the missing gift that Wooly dug up. Pebbles apologizes and the Gruesomes are very understanding. Later, everyone celebrates Wilma’s birthday. It’s her birthday wish that Pebbles will judge people more fairly in the future.
- Pebbles Flintstone
- Bamm-Bamm Rubble
- Moonrock Crater
- Wiggy Rockstone
- Penny Pillar
- Schleprock (mentioned)
- Fred Flintstone
- Barney Rubble
- Wilma Flintstone
- Betty Rubble
- Police officers
- Marina Del Rock (only appearance)
- The Gruesomes' boat (only appearance)
- Wilma's birthday present (only appearance)
- Steak tenderizer (only appearance)
- Creep disguises (only appearance)
- Brontosaurus (as a Bronto-Knocker and a trophy)
- Pterodactyl (as a cuckoo clock)
- Octopusaurus (as a punch server bowl)
- Bamm-Bamm's cave buggy
- Bird-powered boats (only appearance)
|Alan Reed||Fred Flintstone|
|Mel Blanc|| Barney Rubble|
|Jean Vander Pyl|| Wilma Flintstone|
|Gay Autterson|| Wiggy Rockstone|
|Sally Struthers||Pebbles Flintstone|
|Jay North||Bamm-Bamm Rubble|
|Lennie Weinrib|| Moonrock Crater|
|Mitzi McCall||Penny Pillar|
|Don Messick|| Police Officer|
- Marina Del Rock is the spoof of a seaside community, Marina Del Rey, California.
- This episode marked the third and final appearance of the Gruesomes, except Weirdly and Creepella who were only known as the Ghoulstones in the episode, "Fred and Barney Meet the Frankenstones" from The New Fred and Barney Show.
|Episodes of The Pebbles and Bamm-Bamm Show|
|"Gridiron Girl Trouble" • "Putty in Her Hands" • "Frog for a Day" • "The Golden Voice" • "Daddy's Little Helper" • "Focus Foolery" • "Pebbles' Big Boast" • "The Grand Prix Pebbles" • "The Terrible Snorkosaurus" • "Schleprock's New Image" • "Coach Pebbles" • "No Cash and Carry" • "Wooly the Great" • "Mayor May Not" • "They Went That Away" • "The Birthday Present"|