Monster Mystery is a DVD featuring 6 episodes from the first season. It was released on November 26 2007.
Hop on board for 6 fun-packed episodes from Ernie and his pals. With 72 minutes of amazing adventures from International Underground including:
- Monster Mystery
- Running Late
- Light At The End Of The Tunnel
- The Wreck Of Sea Shell Bay
- Pulling Together
- Bon Appetit
- The Wreck Of Sea Shell Bay is incorrectly listed as The Wreck at Seashell Bay.
- Pulling Together is misspelled as Pulling Togther.
- A picture of Circle from Cover Story is featured on the back cover, but that episode isn't on this release.