SpongeBob SquarePants "What's So Spongy?" (Lost Unaired Episode)

In 2007, before Season 5 started airing, the makers of Spongebob delivered an finished episode titled "What's So Spongy?" for Nickelodeon to air. Right after the test screening, Nickelodeon rejected the episode to air because Nickelodeon noticed the episode has too many disturbing scenes and that this episode could start an controversy against the show. The tape which contained the lost unaired episode was left behind in the vaults at Nickelodeon Animation Studio. The episode is currently lost and the only existence is an picture of the title card found at an unknown page from the Wayback Machine.