"Wake Up" and "Escape from the Citadel" are the first two episodes of the sixth season of the American animated television series Adventure Time.

The episodes guest star Kumail Nanjiani as Prismo, M. Emmet Walsh as the Cosmic Owl, Miguel Ferrer as Death, Ron Perlman as the Lich, and Stephen Root as Martin.

Prismo explains that, after the events of an earlier episode, the Lich, an entity driven by the pursuit of causing mass death, is now harmless, functioning like a machine without a purpose.

Prismo explains that killing a wishmaster—as in, waking up the man—is a cosmic crime, but that he will return when his corporeal body falls back asleep.

With the Lich disposed of, Finn pursues his father, who is hitching a ride with escaping criminals on a loose piece of the Citadel, still held on by a vein.

One of the criminals cuts the vein, but Finn holds on, causing his grass sword to envelop his arm and eventually rip away, severing it.

After Martin escapes, Jake eventually reveals to Finn that the Lich has now been turned into a large humanoid baby; the two leave him on the doorstep of Tree Trunks (voiced by Polly Lou Livingston) and Mr.

Because previous episodes illustrated that Finn had had good and loving adoptive parents in Joshua and Margaret, the writers for the series wanted to craft Martin so that he would not be a "carbon copy" of his son.

[5] According to Muto, Martin's design "was based on [Wolfhard's] impression of Sean Connery's costume in [the 1974 film] Zardoz without having seen the movie.

"[5] "Wake Up" featured the return of Kumail Nanjiani as Prismo, M. Emmet Walsh as the Cosmic Owl, and Miguel Ferrer as Death and one of the heads of Grob Gob Glob Grod.

[7] Jason Krell of io9 noted parallels between the scene immediately following the loss of Finn's arm and the end of the 1980 film The Empire Strikes Back.

Robert Lloyd of the Los Angeles Times, wrote that "Wake Up" and "Escape from the Citadel" form a "beautiful, strange and exciting" two-part special episode of the series.

[13] In regards to "Escape from the Citadel", he also noted that "the fate of the Lich takes an amusing new turn," and that the storyline concerning "Finn's cursed sword arm—an ingredient that has festered in the sidelines for weeks—reaches a beguiling new state.

Sava praised Nanjiani's "delightfully low-key" performance in the former, noting that his "soft, smooth voice is perfect for a character that is so laid back he's completely flat, and his casual delivery of ominous lines helps keep the tone light as the material gets heavier.

Ultimately he concluded that "the developments of these two episodes dramatically alter the series' status quo to give this season an added boost of momentum from the very beginning.