The Best Episodes Written By Rebecca Sugar

Steven faces his biggest challenge yet.

The Ice King and Marceline bond over song and memories.

Lion keeps lying on Steven's face while he's sleeping. This leads to Steven discovering a pocket dimension in Lion's mane.

While practicing how to fuse with Gems, Steven accidentally fuses with Connie, forming a half-human and half-Gem, human fusion called Stevonnie.

In this gender-swapped episode, Fionna and Cake must battle the evil Ice Queen.

Princess Bubblegum may be jealous when Finn start hanging out with Flame Princess.

After witnessing Steven and Connie fuse again, Greg explains to them how he learned about gem fusion from his time with Rose Quartz, hoping to pull it off himself in order to grow closer to her.

Finn and his friends must come together as a genuine band in order to open the gate of the Door Lord and get back their taken items.

A look at what Ice King and Marceline were like 996 years ago.

Susan Strong asks Finn and Jake to help fight off the Glub Glubs in the sewers below to regain her people's home in Beautopia.

Marceline's evil father goes on a soul-sucking rampage after Finn and Marceline accidentally release him from the Nightosphere.

When the Lich is accidentally freed from its amber prison in Princess Bubblegum's Castle, Finn and Jake must head forth to stop it from regaining its full power, all while being pestered by the Ice King to give him their blessing to marry Princess Bubblegum.

When a menacing red eye is about to hit Beach City, the only thing that can destroy it is a Laser Light Cannon which once belonged to Steven's mother, Rose Quartz. Thus, Steven enlists the help of his father, Greg, and they search through his storage for the cannon.

Finn has to give a speech at Princess Bubblegum's science barbecue and seeks a quick fix to make himself smarter.

Part 3 of a three-part episode. Finn and Jake chase the Lich through a dimensional portal and meet a wishmaster. After the Lich wishes that humanity never existed, Finn wishes that the Lich never existed.

The princesses tire of Ice King’s crazy Fionna-and-Cake fan-fiction stories, so Marceline stops by the Ice Kingdom to show him how to properly write a story.

Pearl takes Steven to a special place that belonged to Rose Quartz after Lion finds the scabbard for Rose's sword.

Jake embarks on a solo mission to help a broken-hearted Finn.

Finn develops a crush on Flame Princess and tries to get to know her, which proves difficult due to her destructive power.

Princess Bubblegum and Lady Rainicorn look for Finn and Jake, who are missing after a run-in with the Ice King.

Finn and Jake take on a request to protect Wildberry Princess from an unknown assassin. The assassin turns out to be a tiny cat assassin called Me-Mow, who ends up bribing Jake by poisoning him.

Trapped on Peridot's ship, Steven attempts to rescue the Gems from the Homeworld's clutches, including two Gems named Ruby and Sapphire.

While she accompanies Greg and Steven on a road trip to another state and a visit to a motel in that state, Garnet's frustration with what Pearl did in the previous episode causes her to split into Ruby and Sapphire.

Finn is excited to discover what appears to be a tribe of humans living underground near the Candy Kingdom, but gets more than he expected when he tries to teach one of them about the surface world.

Steven tries to master his shapeshifting abilities from Amethyst, but turns his fingers into cats, making it harder to do things.