Into the Deep is a DVD featuring four episodes of The Backyardigans from the second season. It is the ninth volume in The Backyardigans DVD series.
- The front cover of this DVD is inspired by the "Call of the Mermaid" musical sequence from the "Into the Deep".
- This DVD comes with an insert that advertises The Backyardigans books on the front, and the previous two volumes in the DVD series on the back.
- In the episode, there are no flowers on the mermaids' swim caps. However, the DVD cover shows three flowers on each of their caps.
- According to press releases, "Save the Day" was originally scheduled to be released on the Movers & Shakers DVD instead of this one.
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