Listen to the sound clip Casper. from Stewie Griffin Sounds: Family Guy - Season 4: Casper. Casper. This sound is from Stewie Griffin Sounds: Family Guy - Season 4 Stewie Griffin Soundboard from Season 4 of Family Guy, and Stewie Griffin: The Untold Story. Contains about 320 sounds including anger, insults, threats, women, and much more. Go to the full soundboardwith more sound clips Search