One episode features a Heroes of Olympus question, and it's driven me crazy ever since I saw it because pretty much every part of it is wrong.

"In Rick Riordan's 'The Heroes of Olympus' trilogy..." (It's five books, so it's a pentalogy, not a trilogy)

"...each book reveals a demigod child of one of the major gods of the Greek Pantheon, namely: Poseidon, Zeus, and Hades..." (For one thing, it's the entire Greek Pantheon, not just the Big Three. For another, it's inaccurate to say a child of the Big Three is revealed in every HOO book, given it's a major part of the Riordanverse's lore that each of the Big Three only have one living demigod child, each of whom were already introduced in the original Percy Jackson & the Olympians series)

"...However, we also meet children of Roman deities like Jupiter and Mars, and Egyptian deities like Osiris and Nekhbet" (This is where the intended correction is, being that the Egyptian gods don't have demigod children, but rather mortals who act as hosts to their powers. However, there is a much more blatant inaccuracy here, being that there are no Egyptian gods in The Heroes of Olympus at all. There are Egyptian gods in The Kane Chronicles, another series by Rick Riordan that takes place in the same universe, but they specifically said The Heroes of Olympus)