Kit reveals the contents of the sugar bowl, which had otherwise never been revealed, not even in the books.
This is the series finale. Unlike the previous episodes that adapted each book into two episodes, the final book is adapted as one regular-length episode.
When the Baudelaires are introduced to the island facilitator as castaways, he tells them to "Call me Ish." The first sentence in Moby Dick by Herman Melville is "Call me Ishmael."
In the scene where the islanders show the washed up items to Ishmael, the small black statue of a sea creature held by the bearded man on the left is a direct reference to the MacGuffin of Lemony Snicket's All the Wrong Questions book series. It depicts the mythical creature known as the Bombinating Beast.
While marooned on a deserted island, the Baudelaires meet another castaway, who says her name is Friday. "Friday" is the name of the native whom Robinson Crusoe makes his servant after shipwrecking on a deserted island in the 1719 Daniel Defoe novel "The Life and Adventures of Robinson Crusoe."