three times. At lunch, three of the characters make a food pun about the subject of the episode; usually done by Nonny. After lunch, another Gil and Molly sketch is shown. After the sketch, some classroom activity is shown further reinforcing that episode's topic, or Mr. Grouper talks more about the theme. This is usually ended when Mr. Grouper says, "Line up everybody, it's time to go outside!" followed by the "outside song". Outside the classroom, the guppies act out a story about the theme, interfused with Adobe Flash-animated graphics. Once back inside, a second song is typically performed. Afterward, Gil and Molly do another sketch. The guppies may then go on a field trip that focuses on the theme. They yell out, "FIELD TRIP!" This may focus on a problem shown earlier and involves the key characters. The episode concludes with a final sketch by Gil and Molly, followed by a shorter version of the theme song. The credits then roll which include a song played earlier in that episode. Season 5 introduced a new series format which has the story segment take up the majority of the episode, and incorporates the shop and lunch segments into the narrative. Gil and Molly simply introduce themselves before the theme song with no opening gag, the show cuts right to school after the theme, and the dance songs and field trips were removed. Gil and Molly's sketches were removed as well, instead having Mr. Grouper wave goodbye to the viewer as the guppies go back inside. A significant contribution to the show's popularity is its two-level humor track. Minor characters include a police officer named Miranda and a winged serpent named Pretzel-coatl. Heavy metal singer Ozzy Osbourne guest starred as Sid Fishy in the 2015 episode "Super Guppies", while actor George Takei guest starred in a tour de force sci-fi mashup which pitted him as a Darth Vader-like armored villain against starship captain Gil and his first officer, Mr. Smart (Nonny). Any grownup who has ever seen Monty Python's Meaning of Life will instantly recognize recurring character Mr. Grumpfish, while the episode "The Puppy & The Ring" makes in-jokes ranging from JRR Tolkien to L Frank Baum. Although it began in 2011, the show started production in 2009. The voice cast is based in New York and California and the dialogue is recorded at New York-based Dubway Studios and Rhumba Recorders and Burbank-based Nickelodeon Animation Studio.