Twins is an episode of Season 4.
Finn and Fionna are twins, but they would flip out if they knew. So the main characters and their genderbends must try to keep them from finding out.
- Princess Bubblegum
- Prince Gumball
- Marshall Lee
- Ice King
- Ice Queen
- Flame Princess
- Flame Prince
This episode was criticized because the reason Fionna and Finn would flip out is because there is extremely minor hints of incest.
- This episode is the first to have Flame Prince, even though he and his female counterpart only make cameos.
- The snail is hidden behind Princess Bubblegum and Prince Gumball when they are trying to get Finn and Fionna not to fall in love.
- This is the first episode to have incest, even if it's minor.
- This is the first episode to have Marsh in it.