History Main / ThoughtTheyKnewAlready

* ''VideoGame/{{Octodad}}'': In the last level of ''Dadliest Catch'', Stacy is the only person other than [[TheCloudcuckoolanderWasRight the villain]] to be aware that her father, the titular Octodad, is an octopus. She had no idea that the rest of her family wasn't in on it though, and so inadvertently reveals her father's secret to her mother Scarlet and brother Tommy when he shows up during the climax without his trademark [[PaperThinDisguise blue suit]].

* ''WesternAnimation/KingOfTheHill'': It's an extremely obvious OpenSecret that Nancy Gribble is [[{{Cuckold}} cheating on her husband Dale]] with John Redcorn, which led to the birth of [[ChocolateBaby Joseph]]. As it turns out, [[KnowNothingKnowItAll Peggy]] legitimately didn't know about this until over a decade after Joseph was born, and only realized it after Hank all but flat-out told her when he realized her obliviousness to the fact. When Peggy demands to know why Hank never said anything about it before, he admits that he thought she knew already, since ''everyone'' who knows the Gribble family is aware of it. Except, ironically, for Dale and Joseph themselves.

* ''Series/{{Castle}}'': After a lottery winner is killed, Castle recognizes that the winning numbers weren't his usual numbers... but they do match up with some significant dates from his recently-deceased neighbors. The victim regularly ran errands for his neighbor, so he was the one who purchased the ticket; when the neighbor died of natural causes before the drawing, the victim claimed the winning ticket as his own. Beckett tracks down the neighbor's only living relative and accuses him of killing the victim out of the belief that the lottery winnings were rightfully his... only he didn't keep in touch with his uncle and didn't know his uncle's usual numbers, so Beckett just told him that he might have a legal claim to a multi-million dollar jackpot.

* ''WesternAnimation/KingOfTheHill'': It's an extremely obvious OpenSecret that Nancy Gribble is [[{{Cuckold}} cheating on her husband Dale]] with John Redcorn, which led to the birth of [[ChocolateBaby Joseph]]. As it turns out, [[KnowNothingKnowItAll Peggy]] legitimately didn't know about this until over a decade after Joseph was born, and only after Hank all but flat-out told her when he realized her obliviousness to the fact. When Peggy demands to know why Hank never said anything about it before, he admits that he thought she knew already, since ''everyone'' who knows the Gribble family is aware of it. Except, ironically, for Dale and Joseph themselves.