Dani, Chief Wiggum, Homer and Marge were looking for the last clue, Wiggum said that the 3rd Clue was at Krusty Burger, when they arrived at Krusty Burger they found it on a knife, Marge drew it down in the notebook, they had all 3 clues, Homer let Dani use their couch for the Thinking Chair, the 3 clues told the gang that Sideshow Bob took the picture, Wiggum said he was at Krusty Burger, when they got to Krusty Burger, Wiggum arrested Sideshow Bob and gave the picture back to Dani and Pink, Dani and Pink Skaddooed home, Sideshow Bob was arrested, and Marge and Homer went to pick up Bart, Lisa and Maggie, and told them all about their adventure they had today.
Final Clue: Knife