We have more than one page that can be referred to as Sleeper.

* If you want the ''film'' by Creator/WoodyAllen, see [[Film/{{Sleeper}} Film/Sleeper]].
* If you want the ''comic book'' Creator/EdBrubaker about the sleeper agent with an alien artifact, go to Comicbook.{{Sleeper}}.
* If you want the ''trope'' dealing with actual sleeper agents, go to DeepCoverAgent.
* If you want the concept of works that slowly become unexpected successes, go to SleeperHit.

There's also a band, several other films and a tv series that go by that name. If you are looking for someone who has fallen asleep, you might want to [[Administrivia/PeopleSitOnChairs read this]].