In King Of The Hill, Dale Knew His Wife Was Cheating The Whole Time And It's Pretty Obvious

List Rules
Vote up the most compelling evidence pointing towards Dale knowing of his wife's infidelity.

Tons of King of the Hill fan theories exist throughout the Internet, from ones alleging Jeff Boomhauer is an undercover spy to others speculating Peggy suffered a serious brain injury, and an infamous theory that Hank isn't Bobby's father. But none quite hold a candle to Dale Gribble King of the Hill fan theories. When you think about it, the endlessly suspicious Dale makes for excellent speculation, his own neuroses only emphasizing the character as a victim of conspiracy. Dale Gribble knew Joseph wasn't his son, literally so in an episode after realizing he was out of town during his son's conception. Although, to be fair, he believes Nancy got impregnated by aliens.

But Dale knew about Nancy's affair too. With Dale monitoring all incoming calls, Nancy's talks with John Redcorn definitely failed to go unnoticed. Plus, he literally catches Redcorn sneaking into his bedroom with Nancy's help in the middle of the night. If Dale lives such a paranoid conspiracy theorist, why hasn't he figured out that his wife has been cheating on him for 14 years? According to fan theories on Dale Gribble in King of the Hill, he has figured it out, and the proof lies in his story.