King of the Hill - Season 12 - Eps 19: Strangeness on a Train
Stressed that her birthday parties never live up to her expectations, Peggy plans herself a disco-themed party on a mystery train, but after Luanne ruins the surprise, Peggy worries her parties will always end badly. However, a new mystery arises after a couple sneaks away for some private time in the train bathroom, and the partygoers must figure out who did it.
About King of the Hill

Title: King of the Hill
First Air Date: 1997-01-12
Last Air Date: 2009-09-13
Status: Returning Series
Rating: 7.35/10 (from 609 votes)
Language: EN
Seasons: 15
Total Episodes: 265
Network: FOX Hulu
Genres: Animation, Comedy, Family
Production Companies: 20th Century Fox Television, Deedle-Dee Productions, Judgemental Films, 3 Arts Entertainment, Bandera Entertainment, 20th Television Animation
Synopsis
Set in Texas, this animated series follows the life of propane salesman Hank Hill, who lives with his overly confident substitute Spanish teacher wife Peggy, wannabe comedian son Bobby, and naive niece Luanne. Hank has conservative views about God, family, and country, but his values and ethics are often challenged by the situations he, his family, and his beer-drinking neighbors/buddies find themselves in.
Cast

Mike Judge
Hank Hill / Boomhauer (voice)

Kathy Najimy
Peggy Hill (voice)

Pamela Adlon
Bobby Hill (voice)

Stephen Root
Bill Dauterive (voice)

Toby Huss
Dale Gribble/ Cotton Hill/Kahn Souphanousinphone (voice)

Lauren Tom
Minh Souphanousinphone / Connie Souphanousinphone (voice)

Ronny Chieng
Kahn Souphanousinphone