Question: My wife was telling me about a movie or tv shows she saw a long time ago...but can't remember what it was.

A group of people have numbers on their foreheads, which is atypical. They don't know what the numbers are for, but eventually realize that they are the number of days they have left to live. When the countdown reaches 0, something will come for them.

I know this isn't a lot to go on, but it sounded so intriging that I'm very curious. Any ideas?

Answer: 
There was an episode of [Medium](http://www.imdb.com/title/tt0412175/) (season 6, episode 9, "[The Future's So Bright](http://www.imdb.com/title/tt1541338/?ref_=ttep_ep9)") in which Allison starts seeing numbers on or over people's heads, indicating how many days they have left to live. Lee Scanlon's number is 1, indicating that he'll die tomorrow. The plot involves her (a) figuring out what the numbers mean, and (b) trying to prevent Scanlon's death.

This episode aired November 20, 2009, so that's probably inconsistent with your statement that she saw it "a long time ago".
I think the movie you are looking for is called, In Time. Time is currency. It stars Justin Timberlake.