David Hasselhoff is on the currency in the scene when Paul Rudd's character pays the babysitter.
Before the end credits roll, there is a dedication to the memory of the director's father David Jones (aka David Bowie) and his beloved nanny Marion Skene.
According to Duncan Jones, this movie is the first project he suggested to Sam Rockwell, but it was considered too big and thus Moon (2009) was made as the first movie.
The opening music to the film is an orchestral arrangement (by Philip Glass) of the song 'Heroes', originally written and performed by David Bowie as part of his "Berlin trilogy" of albums. David Bowie is director Duncan Jones' father.
Paul Rudd and Justin Theroux's roles are influenced by the Trapper John and Hawkeye Pierce characters from M*A*S*H (1970).