In order to keep as authentic of an American accent as possible, Cillian Murphy didn't use his true Irish accent on set until the film finished shooting.
The entire film was shot in just 22 days.
Cillian Murphys reaction when Lucy Liu almost drops the baby was real because it was his real life son.
While it did premiere at the Tribeca Film Festival in 2007, the film was unable to secure distribution for a theater release and so went straight to DVD.