- 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))
Family Guy — S12E7
Episode: Into Harmony's Way
Air Date: 2013-12-08
Runtime: 22 min
Overview
When Peter and Quagmire discover that their singing voices create beautiful harmony together, they form a singing/songwriting team, in the vein of Simon and Garfunkel. However, tensions run high when fame gets to Peter’s head.