A baby dinosaur is brought into the present time and the Smurfs try to get him back by a magic key. This the first part of the story arc which also includes "Cave Smurfs". This episode was originally featured as a three-part episode and was later broken into two separately titled episodes when it was aired in syndication. Parts 1 and 2 were combined into a single episode, retaining the original title, while Part 3 became "Lost In The Ages".
| Name | Type | Role | |
|---|---|---|---|
| Reed Robbins | Writer | ||
| Ernie Contreras | Writer | ||
| Sean Catherine Derek | Writer | ||
| Glenn Leopold | Writer |