Ep 5. It Came From the Nightosphere / Death in Bloom

It Came From the Nightosphere: In this episode, Finn's father Martin comes to visit him after being absent from his life for a long time. But it soon becomes clear that Martin is not what he seems. He unleashes a creature from the Nightosphere, and Finn and Jake must team up with Marceline the Vampire Queen to stop it from wreaking havoc on their world. Along the way, Finn confronts his feelings about his father and how his absence has affected him.

Death in Bloom: In this episode, Finn and Jake accidentally kill Princess Bubblegum's prized flower while trying to help her with a science experiment. In order to make it up to her, they enter the Land of the Dead to retrieve a new flower. But things take a dark turn when they realize that death is not what it seems in this land, and they must face some difficult decisions in order to save their friend.

Overall, this episode showcases the fun and spooky side of Adventure Time, with plenty of humor and heart to go around. Fans of Finn and Jake's adventures will definitely want to tune in to see how they handle these crazy situations.