Season 15 · Episode 20 · First aired 21 May 2017
A House Full of Peters
Episode 20 of Family Guy season 15 (S15E20), the 289th Family Guy episode overall. Written by Chris Sheridan and directed by Joseph Lee. First broadcast on 21 May 2017.
Story
Lois learns that Peter donated sperm when he was a young man. The consequence arrives at the Griffin house in numbers, as a large group of the children conceived that way turns up unannounced. Peter has to reckon with a family he never knew he had. One of the arrivals goes further than the rest. He sets out to take Peter's place as the husband of Lois.
Voices
| Voice | Characters |
|---|---|
| Seth MacFarlane | Peter Griffin, Brian Griffin, Stewie Griffin |
| Alex Borstein | Lois Griffin |
| Seth Green | Chris Griffin |
| Mila Kunis | Meg Griffin |
| Mike Henry | Cleveland Brown |
| Steve Callaghan | Delivery Man |
| Portia de Rossi | Bonnie Swanson's Prank Call Voice |
Principal voice credits as recorded by IMDb, which lists up to ten credits per episode, so recurring characters can be missing here. Guest voices below come from Wikipedia and TVmaze.
Guest voices
- Jennifer Tilly as Bonnie Swanson
- Sanaa Lathan as Donna Tubbs-Brown
- Olesya Rulin as Russian Meg Griffin Double
- Rachael MacFarlane as Katie
- Portia de Rossi as Bonnie Swanson's Prank Call Voice
- Steve Callaghan as Delivery Man
Season 15: episode 20 of 20
- E1The Boys in the Band
- E2Bookie of the Year
- E3American Gigg-olo
- E4Inside Family Guy
- E5Chris Has Got a Date, Date, Date, Date, Date
- E6Hot Shots
- E7High School English
- E8Carter and Tricia
- E9How the Griffin Stole Christmas
- E10Passenger Fatty-Seven
- E11Gronkowsbees
- E12Peter's Def Jam
- E13The Finer Strings
- E14The Dating Game
- E15Cop and a Half-wit
- E16Saturated Fat Guy
- E17Peter's Lost Youth
- E18The Peter Principal
- E19Dearly Deported
- E20A House Full of PetersYou are here
SourceFacts from Wikipedia: Family Guy season 15 (CC BY-SA 4.0). Spotted an error? See corrections.
Provenance
Facts only- Data refreshed
- 6 September 2026
- Verification
- Checked against Wikidata and IMDb: title, date, numbering and credits agree
- Licence
- Facts are not copyrightable. Source text on Wikipedia is CC BY-SA 4.0; Wikidata is CC0; IMDb data is used for verification under its non-commercial terms.
- Note
- The story summary and notes were written for this site from the sources listed, by Claude in Claude Code on 2026-09-08, awaiting editorial review. Facts only; no dialogue is reproduced. Voice credits: Information courtesy of IMDb (https://www.imdb.com). Used with permission. Guest cast data from TVmaze (https://www.tvmaze.com), CC BY-SA.