"Cave Smurfs" is the first standalone episode that would continue events that took place in a previous episode, which in this case would be "Lost in the Ages" (which, during its original Saturday morning run, was previously Part 3 of "The Smurfs That Time Forgot"). Later episodes in this season would have at least two separate stories that take place in the same time period and/or geographical location that the Smurfs wind up in.