Season 18 · Episode 12 · First aired 23 February 2020
Undergrounded
Episode 12 of Family Guy season 18 (S18E12), the 341st Family Guy episode overall. Written by Mike Desilets and directed by Greg Colton. First broadcast on 23 February 2020.
Story
Short of money for a round at the Drunken Clam, Peter learns that Joe and Cleveland keep credit cards their wives know nothing about. He takes one out, is found out, and Lois grounds him. To reach the bar he digs a tunnel from the house, and a cave-in traps him underground with Quagmire, Cleveland and Joe. The only way out for the four of them rests on Brian giving Peter up to 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 |
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.
Season 18: episode 12 of 20
- E1Yacht Rocky
- E2Bri-Da
- E3Absolutely Babulous
- E4Disney's The Reboot
- E5Cat Fight
- E6Peter & Lois' Wedding
- E7Heart Burn
- E8Shanksgiving
- E9Christmas Is Coming
- E10Connie's Celica
- E11Short Cuts
- E12UndergroundedYou are here
- E13Rich Old Stewie
- E14The Movement
- E15Baby Stewie
- E16Start Me Up
- E17Coma Guy
- E18Better Off Meg
- E19Holly Bibble
- E20Movin' In (Principal Shepherd's Song)
SourceFacts from Wikipedia: Family Guy season 18 (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.