This is the 26th and final episode of the first season.

Dora and Boots travel to Tall Mountain to compete in a contest for the "Silliest Riddle of All".

It is the last episode where Muhammad Cunningham provides the voice for Tico the Squirrel ; Jose Zelaya took over the role in Season 2.

This episode marks the debut of the Knock-Knock Door , an anthropomorphic door that only opens for those who tell it a joke.

This is the final time the Grumpy Old Troll is genuinely annoyed by them solving his riddle; in later seasons, he becomes more impressed and congratulatory.

In certain scenes, Dora's voice sounds like her Season 2 voice, suggesting it may have been one of the last episodes produced for the season.

The final riddle at Tall Mountain asks, "Who can jump higher than a mountain?" The answer is everyone , because mountains can't jump. Production & Trivia