"The Hidden" is the 12th episode of season 1 from The Penguins of Madagascar.
When the penguins, lemurs and Marlene go off to meet the zoo's newest exhibit, they all start disappearing one by one. When only Kowalski is left, he must save his friends by learning to act on instinct instead of intellect.
Skipper is training the penguins to fight blindfolded by trusting their instincts. Kowalski is having trouble as he over-thinks and analyzes every situation scientifically. Meanwhile, new neighbors have moved in and no one has seen them yet so Marlene takes it upon herself to go welcome them with flowers and a cake.
Everyone else is too busy to go with her except Mort, whom was ordered to go with her because he was annoying King Julien. One of the unseen creatures grabs Mort so Marlene enlists the help of the penguins to save him.
King Julien and Maurice show up to give the new neighbors the portrait of him. The creatures start picking up the animals one by one until it is just Kowalski. Kowalski puts on his blindfold and finally trusts his instincts. The creatures turn out to be chameleons who were just trying to invite the animals into their habitat.