In the flashback, Persephone states that she finds Hades “aesthetically pleasing.” Eros says the same thing about how Hades sees her in Episode 65.

Persephone summoned Hades by patting the ground twice. In Episode 58, he offered to help her any time she asks by summoning him.

Hades calls his diamonds “shiny rocks”, a callback to Episode 25, when Rhea asked what he would like to call them as a child.

Artemis keyed “Zeus is a fuck boy” on his car.

When Persephone made the entire world bloom, flower petals are seen falling through a huge hole by the massive royal portrait in Hera and Zeus’ mansion. In Episode 86, when Ares was talking about her mother’s rage, she was seen burning the painting.

As Zeus complains about his family to Hades, Hebe is seen doodling on Ares’ arm cast. This is seen again later when Ares talks to Persephone.

After Minthe gets turned into a plant, Hades mutters, “Oh, sugarsnaps”, an expression that Persephone often uses.

Persephone tells Hades, “You look sufficient.” It’s the same thing he told her when she tried on Hera’s coat, the night they met at his house.

Hebe yells “Perverts!” at her parents when she found them lurking. Hera has taught her that “lurking is a pervert’s sport” as revealed in Episode 29.