After Peter half-heartedly makes a promise to a helpful dolphin, the dolphin moves to Quahog.
Seth MacFarlane
Peter Griffin / Brian Griffin / Stewie Griffin / Glenn Quagmire (voice)
Alex Borstein
Lois Griffin / Tricia Takanawa / Loretta Brown / Barbara Pewterschmidt (voice)
Mila Kunis
Meg Griffin (voice)
Seth Green
Chris Griffin (voice)
Patrick Warburton
Joe Swanson (voice)
Arif Zahir
Cleveland Brown (voice)
Lucy Davis
Joanna Finn (voice)
Ricky Gervais
Billy Finn (voice)
Wellesley Wild
(voice)
Alexandra Breckenridge
Miss Emily (voice)
Chris Cox
Patient (voice)
Steve Callaghan
Milo (voice)
John Viener
TV Announcer / Doctor / Devon (voice)
Alec Sulkin
Man (voice)
Gary Janetti
Christine Lakin
Joyce Kinney (voice)
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