- Kyle Downes as Tom
- Jordan Allison as Jon
- Patricia Gage as Aunt Dahlia
- Kay Tremblay as Mimi
- Judy Sinclair as Lillian
- Aviva Armour-Ostroff as Store Worker
- Julie Holdsworth as Shopper #1
- Ian Heath as Shopper #2
Differences from the story
- The boys were given prune cookies instead of fed prunes.
- In the book, Aunt Dahlia was a witch pretending to be related to children, but, in the episode, she is actually Tom and Jon's aunt they have met before.
- After Tom and Jon are turned back to normal, Jon goes overboard with eating the baby food and turns into a baby. Tom tries to feed him a prune cookie to make him the right age again. But the episode ends before anything happens.
"An Old Story" was released on VHS on September 15, 1998, as the second episode on Bride of the Living Dummy. It was released on DVD on September 5, 2006, as the second episode on My Best Friend Is Invisible.
|Title||Release date||Media type|
Bride of the Living Dummy
|September 15, 1998||VHS|
My Best Friend Is Invisible
|September 5, 2006||DVD|
- The video game that Tom and Jon were playing is the exact game that Casey was playing in "Stay Out of the Basement".
- The opening scene of the house was recycled from "Let's Get Invisible".
- A poster of The Doors' Jim Morrison can be seen hanging over Tom's bed.
- A poster advertising The X-Files can be seen behind the mirror in the convenient store.
- Both Kyle Downes and Jordan Allison donned full old man prosthetic makeups to age from 13 to 80.