Graham (Mel Gibson, center) tries to calm his children, Morgan (Rory Culkin, left) and Bo (Abigail Breslin, right), who think that tin foil hats can stop aliens from reading their minds.

A baby monitor provides a message from above for Graham (Mel Gibson, left) and his brother, Merrill (Joaquin Phoenix, right). 

Graham Hess (Mel Gibson, center left), along with his son, Morgan (Rory Culkin, left), his daughter, Bo (Abigail Breslin, center right), and his brother, Merrill (Joaquin Phoenix, right), investigate the strange occurrence.

Morgan Hess (Rory Culkin, right) shows his father, Graham (Mel Gibson, left) what's going on.

Mel Gibson and Joaquin Phoenix in Signs (2002)

Mel Gibson and M. Night Shyamalan in Signs (2002)

Executive producer Kathleen Kennedy (left) and producers Sam Mercer (center) and Frank Marshall (right) - the producing team behind "The Sixth Sense" - reunite for "Signs." 

Mel Gibson, Joaquin Phoenix, Rory Culkin, and Abigail Breslin in Signs (2002)

The lives of Graham Hess (Mel Gibson, right) and his brother, Merrill (Joaquin Phoenix, left) are changed forever after finding an intricate pattern of circles and lines carved into their crops 

Graham (Mel Gibson, center), flanked by his brother, Merrill (Joaquin Phoenix, left), Officer Paski (Cherry Jones, right), and his son, Morgan (Rory Culkin, foreground), soon find that they are not alone - that crop signs are appearing all over the world

Graham (Mel Gibson) makes a chilling discovery in a neighbor's kitchen

Everything that farmer Graham Hess (Mel Gibson) assumed about the world is changed when he discovers a message - an intricate pattern of circles and lines - carved into his crops.