Dinosaurs follows the life of a family of dinosaurs, living in a modern world. They have TV's, fridges, microwaves, and every modern convenience. The Dinosaurs are an animatronics stone-age working-class family created by Jim Henson for Disney. Incredibly overweight, even for a dinosaur, Earl Sinclair is married to Fran and tries/fails to support 14-year-old valley girl Charlene, 16-year-old Robbie (whose crest eventually turns into a Mohawk and gets dyed purple), widowed, cranky Grandma Ethel, and terrible-twos Baby, the true master of the house. Sharp social commentary is featured surprisingly often; Earl is a tree-pusher for the Wesayso Development Corp., which regularly implements schemes to screw their workers even more and destroy the world for marginal profit increment. Chilled but live prey are kept in the refrigerator and are helpful when you can't find the milk, and caveman Humans make occasional appearances as wild animals and pets.
In this first episode of the series, Earl Sinclair talks to his born son about how his life was before he was born. he talks to him about the stress between his family and how his wife Fran Sinclair had been dealing with a lot of troubles and situations over the past. Earl also talks about how he wanted his boss B.P. Richfield to give him a first raise.
Fran feels very depressed after staying up all night trying to keep Baby from being awake and trying to go to sleep. That morning Baby went to sleep and Fran was outraged and upset that she did not get enough sleep. Earl and Roy later tries to find out what's wrong with Fran's life and they believe that if she wasen't with the children she would have a perfect life. Later, Farn goes to her mothers to spend some time with her, while Earl tries to make dinner. Fran later comes home to tell Earl that there is defidently something wrong in her life. When Earl watches TV, he thinks that the only way to cheer Fran up again is the mating dance.
Earl gleefully awaits ""Hurling Day"" when he'll have the ritual honor of heaving his mother-in-law into the tar pits, but Robbie thinks the tradition should be chucked.
Earl's blood runs colder and outraged when a monstrous male who notices Fran in the supermarket challenges him to a fight to the death for her -- Earl makes no backup but to except the challenge and the battle later takes place in front of his house. Earl quickly attacks hims and Fran stops everything telling Gary to stay away from her, her family and her life.
It's time for the big howl for the next dinosaur generation, but Robbie questions howling as a rite of passage. Earl forces Robbie to do the howling but Robbie still doesn't see the reason why he should howl, when he goes to the top of the mountain to get ready for his howl, he refuses to howl and knows that nothing is going to happen. Meanwhile; Earl friendship with Roy is becoming very serious when the two fight over after Roy was actually eating his own food and minding his own business that causes earl to be very selfish and vulnerable.