wake up

"Wake Up" and "Escape from the Citadel" are the first two episodes of the sixth season of the American animated television series Adventure Time. "Wake Up" was written and storyboarded by Andy Ristaino and Cole Sanchez, whereas "Escape from the Citadel" was storyboarded by Tom Herpich and Steve Wolfhard. Both episodes' stories were developed by Kent Osborne, Pendleton Ward, Jack Pendarvis, and Adam Muto. The two episodes originally aired on Cartoon Network on April 21, 2014. 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.

Wake Up may refer to:

• Emerge from sleep

Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. It is the world's most widely consumed psychoactive drug, but — unlike many other psychoactive substances — it is legal and unregulated in nearly all parts of the world. There are several known mechanisms of action to explain the effects of caffeine. The most prominent is that it reversibly blocks the action of adenosine on its receptor and consequently prevents the onset of drowsiness induced by adenosine. Caffeine also stimulates certain portions of the autonomic nervous system.